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CVE-2026-27590

Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport

8.9 HighFix available

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.61%Up 0.5 points since Feb 25, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.9

Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.

Record
CVE-2026-27590
CVSS 4.0
8.9 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Weakness
CWE-20, CWE-180
Updated
2026-11-02
EUVDEUVD-2026-8545 8.9

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.

Record
EUVD-2026-8545
CVSS 4.0
8.9 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Updated
2026-11-02
GitHub AdvisoriesGHSA-5r3v-vc8m-m96g 8.9

Caddy: Unicode case-folding length expansion causes incorrect split_path index in FastCGI transport

Summary

Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment).

Details

The issue is in github.com/caddyserver/caddy/modules/caddyhttp/fastcgi.Trasnport.splitPos() (and the subsequent slicing in buildEnv()):

lowerPath := strings.ToLower(path)
idx := strings.Index(lowerPath, strings.ToLower(split))
return idx + len(split)

The returned index is computed in the byte space of lowerPath, but buildEnv() applies it to the original path:

  • docURI = path[:splitPos]
  • pathInfo = path[splitPos:]
  • scriptName = strings.TrimSuffix(path, fc.pathInfo)
  • scriptFilename = caddyhttp.SanitizedPathJoin(fc.documentRoot, fc.scriptName)

This assumes lowerPath and path have identical byte lengths and identical byte offsets, which is not true for some Unicode case mappings. Certain characters expand when lowercased (UTF-8 byte length increases), shifting the computed index. This creates a mismatch where .php is found in the lowercased string at an offset that does not correspond to the same position in the original string, causing the split point to land later/earlier than intended.

PoC

Create a small Go program that reproduces Caddy's splitPos() behavior (compute the .php split point on a lowercased path, then use that byte index on the original path):

  1. Save this as poc.go:
package main

import (
	"fmt"
	"strings"
)

func splitPos(path string, split string) int {
	lowerPath := strings.ToLower(path)
	idx := strings.Index(lowerPath, strings.ToLower(split))
	if idx < 0 {
		return -1
	}
	return idx + len(split)
}

func main() {
	// U+023A: Ⱥ (UTF-8: C8 BA). Lowercase is ⱥ (UTF-8: E2 B1 A5), longer in bytes.
	path := "/ȺȺȺȺshell.php.txt.php"
	split := ".php"

	pos := splitPos(path, split)

	fmt.Printf("orig bytes=%d\n", len(path))
	fmt.Printf("lower bytes=%d\n", len(strings.ToLower(path)))
	fmt.Printf("splitPos=%d\n", pos)

	fmt.Printf("orig[:pos]=%q\n", path[:pos])
	fmt.Printf("orig[pos:]=%q\n", path[pos:])

	// Expected split: right after the first ".php" in the original string
	want := strings.Index(path, split) + len(split)
	fmt.Printf("expected splitPos=%d\n", want)
	fmt.Printf("expected orig[:]=%q\n", path[:want])
}
  1. Run it:
go run poc.go

Output on my side:

orig bytes=26
lower bytes=30
splitPos=22
orig[:pos]="/ȺȺȺȺshell.php.txt"
orig[pos:]=".php"
expected splitPos=18
expected orig[:]="/ȺȺȺȺshell.php"

Expected split is right after the first .php (/ȺȺȺȺshell.php). Instead, the computed split lands later and cuts the original path after shell.php.txt, leaving .php as the remainder.

Impact

Security boundary bypass/path confusion in script resolution. In typical deployments, .php extension boundaries are relied on to decide what is executed by PHP. This bug can cause Caddy/FPM to execute a different file than intended by confusing SCRIPT_NAME/SCRIPT_FILENAME. If an attacker can place attacker-controlled content into a file that can be resolved as SCRIPT_FILENAME (common in web apps with uploads or writable directories), this can lead to unintended PHP execution of non-.php files and potentially remote code execution. Severity depends on deployment and presence of attacker-controlled file writes, but the primitive itself is remotely triggerable via crafted URLs.

This vulnerability was initially reported to FrankenPHP…

Record
GHSA-5r3v-vc8m-m96g
CVSS 4.0
8.9 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Weakness
CWE-20
Updated
2026-11-02
NVD 8.9

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.

Record
CVE-2026-27590
CVSS 4.0
8.9 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-20, CWE-180
Updated
2026-11-02
OSVALPINE-CVE-2026-27590 9.8

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.

Record
ALPINE-CVE-2026-27590
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSV 8.9

Caddy: Unicode case-folding length expansion causes incorrect split_path index (SCRIPT_NAME/PATH_INFO confusion) in FastCGI transport

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.

Record
CVE-2026-27590
CVSS 4.0
8.9 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Weakness
CWE-180, CWE-20
Updated
2026-11-02
Show 6 moreShow less
OSVDEBIAN-CVE-2026-27590 9.8

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.

Record
DEBIAN-CVE-2026-27590
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-5r3v-vc8m-m96g 8.9

Caddy: Unicode case-folding length expansion causes incorrect split_path index in FastCGI transport

Summary

Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment).

Details

The issue is in github.com/caddyserver/caddy/modules/caddyhttp/fastcgi.Trasnport.splitPos() (and the subsequent slicing in buildEnv()):

lowerPath := strings.ToLower(path)
idx := strings.Index(lowerPath, strings.ToLower(split))
return idx + len(split)

The returned index is computed in the byte space of lowerPath, but buildEnv() applies it to the original path:

  • docURI = path[:splitPos]
  • pathInfo = path[splitPos:]
  • scriptName = strings.TrimSuffix(path, fc.pathInfo)
  • scriptFilename = caddyhttp.SanitizedPathJoin(fc.documentRoot, fc.scriptName)

This assumes lowerPath and path have identical byte lengths and identical byte offsets, which is not true for some Unicode case mappings. Certain characters expand when lowercased (UTF-8 byte length increases), shifting the computed index. This creates a mismatch where .php is found in the lowercased string at an offset that does not correspond to the same position in the original string, causing the split point to land later/earlier than intended.

PoC

Create a small Go program that reproduces Caddy's splitPos() behavior (compute the .php split point on a lowercased path, then use that byte index on the original path):

  1. Save this as poc.go:
package main

import (
	"fmt"
	"strings"
)

func splitPos(path string, split string) int {
	lowerPath := strings.ToLower(path)
	idx := strings.Index(lowerPath, strings.ToLower(split))
	if idx < 0 {
		return -1
	}
	return idx + len(split)
}

func main() {
	// U+023A: Ⱥ (UTF-8: C8 BA). Lowercase is ⱥ (UTF-8: E2 B1 A5), longer in bytes.
	path := "/ȺȺȺȺshell.php.txt.php"
	split := ".php"

	pos := splitPos(path, split)

	fmt.Printf("orig bytes=%d\n", len(path))
	fmt.Printf("lower bytes=%d\n", len(strings.ToLower(path)))
	fmt.Printf("splitPos=%d\n", pos)

	fmt.Printf("orig[:pos]=%q\n", path[:pos])
	fmt.Printf("orig[pos:]=%q\n", path[pos:])

	// Expected split: right after the first ".php" in the original string
	want := strings.Index(path, split) + len(split)
	fmt.Printf("expected splitPos=%d\n", want)
	fmt.Printf("expected orig[:]=%q\n", path[:want])
}
  1. Run it:
go run poc.go

Output on my side:

orig bytes=26
lower bytes=30
splitPos=22
orig[:pos]="/ȺȺȺȺshell.php.txt"
orig[pos:]=".php"
expected splitPos=18
expected orig[:]="/ȺȺȺȺshell.php"

Expected split is right after the first .php (/ȺȺȺȺshell.php). Instead, the computed split lands later and cuts the original path after shell.php.txt, leaving .php as the remainder.

Impact

Security boundary bypass/path confusion in script resolution. In typical deployments, .php extension boundaries are relied on to decide what is executed by PHP. This bug can cause Caddy/FPM to execute a different file than intended by confusing SCRIPT_NAME/SCRIPT_FILENAME. If an attacker can place attacker-controlled content into a file that can be resolved as SCRIPT_FILENAME (common in web apps with uploads or writable directories), this can lead to unintended PHP execution of non-.php files and potentially remote code execution. Severity depends on deployment and presence of attacker-controlled file writes, but the primitive itself is remotely triggerable via crafted URLs.

This vulnerability was initially reported to FrankenPHP…

Record
GHSA-5r3v-vc8m-m96g
CVSS 4.0
8.9 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
Weakness
CWE-20
Updated
2026-11-02
OSVUBUNTU-CVE-2026-27590 8.9

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, Caddy's FastCGI path splitting logic computes the split index on a lowercased copy of the request path and then uses that byte index to slice the original path. This is unsafe for Unicode because strings.ToLower() can change UTF-8 byte length for some characters. As a result, Caddy can derive an incorrect SCRIPT_NAME/SCRIPT_FILENAME and PATH_INFO, potentially causing a request that contains .php to execute a different on-disk file than intended (path confusion). In setups where an attacker can control file contents (e.g., upload features), this can lead to unintended PHP execution of non-.php files (potential RCE depending on deployment). Version 2.11.1 fixes the issue.

Record
UBUNTU-CVE-2026-27590
CVSS 4.0
8.9 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGO-2026-4536 No score

Unicode case-folding causes incorrect split_path index in github.com/caddyserver/caddy/v2

Unicode case-folding causes incorrect split_path index in github.com/caddyserver/caddy/v2

Record
GO-2026-4536
Updated
2026-11-02
OSVopenSUSE-SU-2026:21483-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260723T184607 2026-07-23T18:46:07Z (jsc#PED-11136).

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-4730 CVE-2026-33022 GHSA-cv4x-93xx-wgfj
  • GO-2026-4761 CVE-2026-33211 GHSA-j5q5-j9gm-2w5c
  • GO-2026-5102 CVE-2026-45021 GHSA-3vcp-chfh-f6r2
  • GO-2026-5272 CVE-2026-40938 GHSA-94jr-7pqp-xhcq
  • GO-2026-5486 CVE-2026-40924 GHSA-m2cx-gpqf-qf74
  • GO-2026-5542 CVE-2026-40090 GHSA-pj97-4p9w-gx3q
  • GO-2026-5630 CVE-2026-25542 GHSA-rmx9-2pp3-xhcr
  • GO-2026-5643 CVE-2026-40923 GHSA-rx35-6rhx-7858
  • GO-2026-5675 CVE-2026-41492 GHSA-vvf7-6rmr-m29q
  • GO-2026-5711 CVE-2026-40161 GHSA-wjxp-xrpv-xpff
  • GO-2026-5746 CVE-2026-41567 GHSA-x86f-5xw2-fm2r
  • GO-2026-5749 CVE-2026-41328 GHSA-x92x-px7w-4gx4
  • GO-2026-5837 CVE-2026-44840 GHSA-q2m9-6jp9-c6mc
  • GO-2026-5929 CVE-2026-44342 GHSA-26v7-h57m-gh9m
  • GO-2026-5930 CVE-2026-33655 GHSA-6qcr-qxgr-m7fv
  • GO-2026-5933 GHSA-3g4q-2f67-2gvh
  • GO-2026-5934 GHSA-59qp-cfj3-rp64
  • GO-2026-5935 GHSA-7856-g3gv-9wq8
  • GO-2026-5936 CVE-2026-53552 GHSA-26rh-24rg-j3vv
  • GO-2026-5937 CVE-2026-53508 GHSA-2jcc-mxv7-p3f9
  • GO-2026-5938 CVE-2026-53553 GHSA-4g5x-hcwm-82jw
  • GO-2026-5939 CVE-2026-10517 GHSA-698x-9w2p-7vvp
  • GO-2026-5940 CVE-2026-53572 GHSA-6w3m-4hhp-775q
  • GO-2026-5941 CVE-2026-53487 GHSA-gvhc-wv3v-7pf8
  • GO-2026-5942 CVE-2026-46600
  • GO-2026-5944 CVE-2026-50197 GHSA-659f-rgp5-w4wf
  • GO-2026-5945 CVE-2026-6815 GHSA-rmxx-v9rj-vpvg
  • GO-2026-5946 CVE-2026-52831 GHSA-v5px-423j-pf7p
  • GO-2026-5947 CVE-2026-53649 GHSA-xqhv-chqm-fhcc
  • GO-2026-5948 CVE-2026-50554 GHSA-588f-fvcv-xhvf
  • GO-2026-5949 CVE-2026-50553 GHSA-rqrh-8wpv-x7hh
  • GO-2026-5950 CVE-2026-53602 GHSA-339v-266x-79xr
  • GO-2026-5951 CVE-2026-10219 GHSA-6jm8-4fhr-5w64
  • GO-2026-5952 CVE-2026-49834 GHSA-9vcr-p3rj-q5q6
  • GO-2026-5953 CVE-2026-9094 GHSA-c9w5-qp6m-m395
  • GO-2026-5956 CVE-2026-55252 GHSA-h5g6-xmh4-hc37
  • GO-2026-5957 CVE-2026-54158 GHSA-5xfx-xj4h-5p7r
  • GO-2026-5958 CVE-2026-54068 GHSA-gcm7-57gf-953c
  • GO-2026-5959 CVE-2026-54072 GHSA-h29v-hj44-q8cv
  • GO-2026-5961 CVE-2026-54069 GHSA-hvr9-72v2-fff3
  • GO-2026-5962 CVE-2026-54088 GHSA-m93h-4hw7-5qcm
  • GO-2026-5963 CVE-2026-54067 GHSA-mvjr-vv3c-w4qv
  • GO-2026-5964 CVE-2026-54066 GHSA-p4m3-mgmm-c664
  • GO-2026-5965 CVE-2026-54070 GHSA-w7cg-whh7-xp28
  • GO-2026-5966 CVE-2026-54089 GHSA-xqp3-jq6g-x3qm
  • GO-2026-5967 CVE-2026-50551 GHSA-56mp-4f3v-fgj2
  • GO-2026-5968 CVE-2026-54174 GHSA-fpg8-7664-jc5q
  • GO-2026-5969 GHSA-g936-7jqj-mwv8
  • GO-2026-5970 CVE-2026-56852
  • GO-2026-5973 CVE-2026-54250 GHSA-jxr7-mqhw-9p98
  • GO-2026-5974 CVE-2026-44300 GHSA-wmj8-9953-vff5
  • GO-2026-5975 CVE-2026-50018 GHSA-42j2-w334-qxw7
  • GO-2026-5976 CVE-2026-50141 GHSA-g7mm-9vx7-jm7h
  • GO-2026-5977 CVE-2026-50013 GHSA-qrh4-p6v4-mrfg
  • GO-2026-5978 CVE-2026-50125 GHSA-qw5r-ppcg-f8rj
  • GO-2026-5979 CVE-2026-50006 GHSA-xrcf-6jh3-ggvx
  • GO-2026-5980 CVE-2026-50158 GHSA-2c7f-fxww-6w6c
  • GO-2026-5981 GHSA-mqxv-9rm6-w8qc
  • GO-2026-5982 GHSA-pqg7-v6wh-3pfp
  • GO-2026-5984 CVE-2026-53604 GHSA-2p2f-px33-4vv5
  • GO-2026-5985 GHSA-7rx3-5wx3-5v76
  • GO-2026-5986 CVE-2026-61699 GHSA-cm26-5974-52h8
  • GO-2026-5987 CVE-2026-55513 GHSA-g4x6-jcvr-9m3g
  • GO-2026-5988 CVE-2026-54628 GHSA-hwrq-8wxh-q4xv
  • GO-2026-5989 CVE-2026-55512 GHSA-m3cx-mwpg-32jg
  • GO-2026-5990 CVE-2026-54629 GHSA-mf78-3rpf-r784
  • GO-2026-5991 CVE-2026-53603 GHSA-q4vm-pq3q-8wgq
  • GO-2026-5992 CVE-2026-61549 GHSA-qf34-295c-26v8
  • GO-2026-5996 CVE-2026-54450 GHSA-pph6-vfjv-vpjw
  • GO-2026-5997 CVE-2026-54452 GHSA-xgch-x3mx-cm3c
  • GO-2026-5998 CVE-2026-54495 GHSA-398h-7f66-3h4p
  • GO-2026-5999 CVE-2026-10814 GHSA-jh6h-v6mp-h22v
  • GO-2026-6002 CVE-2026-58196 GHSA-pr64-jmmf-jp54
  • GO-2026-6003 CVE-2026-53714 GHSA-22xc-xg2r-9j7v
  • GO-2026-6004 CVE-2026-52833 GHSA-3v79-m2cg-89ww
  • GO-2026-6005 CVE-2026-53715 GHSA-8fv2-88gg-hm7q
  • GO-2026-6006 CVE-2026-53716 GHSA-cxpq-8v7q-cg56 *…
Record
openSUSE-SU-2026:21483-1
Updated
2026-11-02
OSVSUSE-SU-2026:0757-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

Update to version 0.0.20260226T182644 2026-02-26T18:26:44Z (jsc#PED-11136) Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2025-4259 CVE-2025-13767 GHSA-fmqf-pmcm-8cx9
  • GO-2025-4260 CVE-2025-64641 GHSA-vww6-79rv-3j4x
  • GO-2026-4282 CVE-2017-18873 GHSA-x6mw-hf2j-vqpc
  • GO-2026-4305 CVE-2017-18903 GHSA-fcwg-45jh-5qhf
  • GO-2026-4325 CVE-2025-14822 GHSA-9r42-rhw3-2222
  • GO-2026-4326 CVE-2025-14435 GHSA-mx8m-v8qm-xwr8
  • GO-2026-4332 CVE-2026-23644 GHSA-2657-3c98-63jq
  • GO-2026-4348 CVE-2026-23991 GHSA-846p-jg2w-w324
  • GO-2026-4349 CVE-2026-23992 GHSA-fphv-w9fq-2525
  • GO-2026-4377 CVE-2026-24686 GHSA-jqc5-w2xx-5vq4
  • GO-2026-4410 CVE-2026-25140 GHSA-f4w5-5xv9-85f6
  • GO-2026-4502 CVE-2026-25766 GHSA-pgvm-wxw2-hrv9
  • GO-2026-4534 CVE-2026-25899 GHSA-2mr3-m5q5-wgp6
  • GO-2026-4535 CVE-2026-27585 GHSA-4xrr-hq4w-6vf4
  • GO-2026-4536 CVE-2026-27590 GHSA-5r3v-vc8m-m96g
  • GO-2026-4537 CVE-2026-27589 GHSA-879p-475x-rqh2
  • GO-2026-4538 CVE-2026-27587 GHSA-g7pc-pc7g-h8jh
  • GO-2026-4539 CVE-2026-27586 GHSA-hffm-g8v7-wrv7
  • GO-2026-4540 CVE-2026-25891 GHSA-m3c2-496v-cw3v
  • GO-2026-4541 CVE-2026-27588 GHSA-x76f-jf84-rqj8
  • GO-2026-4543 CVE-2026-25882 GHSA-mrq8-rjmw-wpq3
  • GO-2026-4559 CVE-2026-27141

Update to version 0.0.20260225T230704 2026-02-25T23:07:04Z.

  • GO-2026-4358 CVE-2026-24137 GHSA-fcv2-xgw5-pqxf
  • GO-2026-4361 GHSA-c32p-wcqj-j677
  • GO-2026-4394 CVE-2026-24051 GHSA-9h8m-3fm2-qjrq
  • GO-2026-4399 CVE-2026-25518 GHSA-gx3x-vq4p-mhhv
  • GO-2026-4507 CVE-2026-26314 GHSA-2gjw-fg97-vg3r
  • GO-2026-4508 CVE-2026-26313 GHSA-689v-6xwf-5jf3
  • GO-2026-4509 CVE-2026-27017 GHSA-7m29-f4hw-g2vx
  • GO-2026-4511 CVE-2026-26315 GHSA-m6j8-rg6r-7mv8
  • GO-2026-4512 CVE-2026-26995 GHSA-rrxv-pmq9-x67r
  • GO-2026-4531 CVE-2026-25591 GHSA-w6x6-9fp7-fqm4
  • GO-2026-4532 CVE-2026-25802 GHSA-299v-8pq9-5gjq
  • GO-2026-4533 CVE-2026-27571 GHSA-qrvq-68c2-7grw
  • GO-2026-4542 CVE-2026-27598 GHSA-6v48-fcq6-ff23
  • GO-2026-4545 CVE-2025-50180 GHSA-3c9r-837r-qqm4
  • GO-2026-4546 CVE-2026-27611 GHSA-8vrh-3pm2-v4v6
  • GO-2026-4547 CVE-2026-27626 GHSA-49gm-hh7w-wfvf
  • GO-2026-4548 GHSA-2phg-qgmm-r638

Update to version 0.0.20260223T182315 2026-02-23T18:23:15Z.

  • GO-2026-4392 CVE-2026-24845 GHSA-9m43-p3cx-w8j5
  • GO-2026-4434 CVE-2023-43635 GHSA-4jvr-vj2c-8q37
  • GO-2026-4435 CVE-2023-43636 GHSA-5h7v-g49c-h887
  • GO-2026-4436 CVE-2023-43637 GHSA-g7vp-j25f-h34p
  • GO-2026-4442 GHSA-x9p2-77v6-6vhf
  • GO-2026-4444 CVE-2026-23989 GHSA-9j2f-3rj3-wgpg
  • GO-2026-4445 CVE-2026-25760 GHSA-2286-hxv5-cmp2
  • GO-2026-4446 CVE-2026-24851 GHSA-jq9f-gm9w-rwm9
  • GO-2026-4447 GHSA-vf5j-r2hw-2hrw
  • GO-2026-4448 CVE-2025-64111 GHSA-gg64-xxr9-qhjp
  • GO-2026-4449 CVE-2025-64175 GHSA-p6x6-9mx6-26wj
  • GO-2026-4450 CVE-2026-23632 GHSA-5qhx-gwfj-6jqr
  • GO-2026-4451 CVE-2026-22592 GHSA-cr88-6mqm-4g57
  • GO-2026-4452 CVE-2026-24135 GHSA-jp7c-wj6q-3qf2
  • GO-2026-4453 CVE-2026-23633 GHSA-mrph-w4hh-gx3g
  • GO-2026-4454 GHSA-26gq-grmh-6xm6
  • GO-2026-4455 CVE-2025-70963 GHSA-9f8m-9547-2gqm
  • GO-2026-4456 CVE-2025-13523 GHSA-ffx7-34p2-vm3w
  • GO-2026-4457 CVE-2025-65852 GHSA-rjv5-9px2-fqw6
  • GO-2026-4458 CVE-2026-25793 GHSA-69x3-g4r3-p962
  • GO-2026-4459 CVE-2017-18907 GHSA-42x9-rr3c-gr59
  • GO-2026-4460 CVE-2017-18918 GHSA-5ghq-28r7-qwfj
  • GO-2026-4461 CVE-2026-25804 GHSA-86x4-wp9f-wrr9
  • GO-2026-4462 CVE-2017-18915 GHSA-hxxj-8phw-74vw
  • GO-2026-4463 CVE-2017-18917 GHSA-jxc4-w54c-qv5r
  • GO-2026-4464 CVE-2017-18911 GHSA-m462-mqw4-2c8m
  • GO-2026-4465 GHSA-vhvq-fv9f-wh4q
  • GO-2026-4466 CVE-2026-25791 GHSA-wxrw-gvg8-fqjp
  • GO-2026-4467 CVE-2017-18916 GHSA-x33g-375j-jhf7
  • GO-2026-4471 CVE-2025-66630 GHSA-68rr-p4fp-j59v
  • GO-2026-4473 CVE-2026-25934 GHSA-37cx-329c-33x3
  • GO-2026-4474 CVE-2026-25890 GHSA-4mh3-h929-w968
  • GO-2026-4475 CVE-2026-25889 GHSA-hxw8-4h9j-hq2r
  • GO-2026-4476 CVE-2017-18908…
Record
SUSE-SU-2026:0757-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/caddyserver/caddy/v2
Go
 before 2.11.1
2.11.1
caddy
Alpine:v3.23
 before 2.11.2-r0
2.11.2-r0
caddy
Alpine:v3.24
 before 2.11.1-r0
2.11.1-r0
caddy
Debian:12
 before 2.6.2-5+deb12u1, plus listed versions
2.6.2-5
2.6.2-5+deb12u1
caddy
Debian:13
 before 2.6.2-12+deb13u1, plus listed versions
2.6.2-12
2.6.2-12+deb13u1
caddy
Debian:14
 before 2.11.2-1, plus listed versions
2.11.2-1~bpo13+12.6.2-122.6.2-132.6.2-14
2.11.2-1
govulncheck-vulndb
openSUSE:Leap 15.6
From an advisory covering 104 CVEs
 before 0.0.20260226T182644-150000.1.149.1
0.0.20260226T182644-150000.1.149.1
caddy
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
2.6.2-62.6.2-6ubuntu0.24.04.12.6.2-6ubuntu0.24.04.22.6.2-6ubuntu0.24.04.2+esm12.6.2-6ubuntu0.24.04.32.6.2-6ubuntu0.24.04.3+esm12.6.2-6ubuntu0.24.04.3+esm2
 None known
caddy
Ubuntu:25.10
 All versions, plus listed versions
2.6.2-92.6.2-112.6.2-12
 None known
caddy
Ubuntu:26.10
 All versions, plus listed versions
2.6.2-142.11.4-1
 None known
caddy
Ubuntu:Pro:26.04:LTS
 All versions, plus listed versions
2.6.2-122.6.2-142.6.2-14ubuntu0.26.04.1~esm1
 None known
govulncheck-vulndb
openSUSE:Leap 16.0
From an advisory covering 1734 CVEs
 before 0.0.20260723T184607-160000.1.1
0.0.20260723T184607-160000.1.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-27590 is a high vulnerability (CVSS 8.9) in Caddyserver Caddy, published February 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.61%, the 49th percentile. Fixed in github.com/caddyserver/caddy/v2 2.11.1.

References

Show 194 moreShow less
This page doesn't list everything

Left out here: 1,547 references and the rest of 4 source descriptions. The JSON record has them.

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