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CVE-2026-40890

github.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer

7.5 HighFix available

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

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
None
Integrity
None
Availability
High

Exploit likelihood

0.35%Up 0.3 points since Apr 22, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.5

github.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

Record
CVE-2026-40890
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
EUVDEUVD-2026-24280 7.5

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

Record
EUVD-2026-24280
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-77fj-vx54-gvh7 7.5

Go Markdown has an Out-of-bounds Read in SmartypantsRenderer

Summary

Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic.

Details

The smartLeftAngle() function in html/smartypants.go:367-376 performs an out-of-bounds slice operation when processing a < character that is not followed by a > character anywhere in the remaining text. https://github.com/gomarkdown/markdown/blob/37c66b85d6ab025ba67a73ba03b7f3ef55859cca/html/smartypants.go#L367-L376 If the length of the slice is lower than its capacity, this leads to an extra byte of data read. If the length equals the capacity, this leads to a panic.

PoC

package main

import (
	"bytes"
	"fmt"

	"github.com/gomarkdown/markdown/html"
)

func main() {
	src := []byte("<a")

	fmt.Printf("Input: %q  (len=%d, cap=%d)\n", src, len(src), cap(src))

	var buf bytes.Buffer
	sp := html.NewSmartypantsRenderer(html.Smartypants)
	sp.Process(&buf, src) // panics: slice bounds out of range

	fmt.Printf("Output: %q\n", buf.String())
}

Impact

This vulnerability will lead to a Denial of Service / panic on the processing service.

-- The Datadog Security Team

Record
GHSA-77fj-vx54-gvh7
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
NVD 7.5

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

Record
CVE-2026-40890
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
OSV 7.5

github.com/gomarkdown/markdown: Out-of-bounds Read in SmartypantsRenderer

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

Record
CVE-2026-40890
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-03
OSVDEBIAN-CVE-2026-40890 7.5

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

Record
DEBIAN-CVE-2026-40890
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVGHSA-77fj-vx54-gvh7 7.5

Go Markdown has an Out-of-bounds Read in SmartypantsRenderer

Summary

Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic.

Details

The smartLeftAngle() function in html/smartypants.go:367-376 performs an out-of-bounds slice operation when processing a < character that is not followed by a > character anywhere in the remaining text. https://github.com/gomarkdown/markdown/blob/37c66b85d6ab025ba67a73ba03b7f3ef55859cca/html/smartypants.go#L367-L376 If the length of the slice is lower than its capacity, this leads to an extra byte of data read. If the length equals the capacity, this leads to a panic.

PoC

package main

import (
	"bytes"
	"fmt"

	"github.com/gomarkdown/markdown/html"
)

func main() {
	src := []byte("<a")

	fmt.Printf("Input: %q  (len=%d, cap=%d)\n", src, len(src), cap(src))

	var buf bytes.Buffer
	sp := html.NewSmartypantsRenderer(html.Smartypants)
	sp.Process(&buf, src) // panics: slice bounds out of range

	fmt.Printf("Output: %q\n", buf.String())
}

Impact

This vulnerability will lead to a Denial of Service / panic on the processing service.

-- The Datadog Security Team

Record
GHSA-77fj-vx54-gvh7
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
OSVUBUNTU-CVE-2026-40890 7.5

The package github.com/gomarkdown/markdown is a Go library for parsing Markdown text and rendering as HTML. Processing a malformed input containing a < character that is not followed by a > character anywhere in the remaining text with a SmartypantsRenderer will lead to Out of Bounds read or a panic. This vulnerability is fixed with commit 759bbc3e32073c3bc4e25969c132fc520eda2778.

Record
UBUNTU-CVE-2026-40890
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVGO-2026-5208 No score

Go Markdown has an out-of-bounds read in SmartypantsRenderer in github.com/gomarkdown/markdown

Go Markdown has an out-of-bounds read in SmartypantsRenderer in github.com/gomarkdown/markdown

Record
GO-2026-5208
Updated
2026-11-02
OSVopenSUSE-SU-2026:21551-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260727T201416 2026-07-27T20:14:16Z (jsc#PED-11136):

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-5046 CVE-2026-46385 GHSA-w8j3-pq8g-8m7w
  • GO-2026-5047 CVE-2026-46384 GHSA-mc57-h6j3-3hmv
  • GO-2026-5048 GHSA-mx64-mj3q-7prj
  • GO-2026-5051
  • GO-2026-5069 CVE-2026-30246 GHSA-35hp-hqmv-8qg8
  • GO-2026-5074 CVE-2026-45022 GHSA-389r-gv7p-r3rp
  • GO-2026-5105 CVE-2026-41506 GHSA-3xc5-wrhm-f963
  • GO-2026-5116 CVE-2026-44517 GHSA-49p4-px3h-rq49
  • GO-2026-5158 CVE-2026-41178 GHSA-5wrp-cwcj-q835
  • GO-2026-5198 CVE-2026-41642 GHSA-7235-89m6-f4px
  • GO-2026-5208 CVE-2026-40890 GHSA-77fj-vx54-gvh7
  • GO-2026-5266 CVE-2026-41643 GHSA-8rxh-r2p6-7f2q
  • GO-2026-5309 GHSA-c3wq-j5vh-68rc
  • GO-2026-5327 CVE-2026-2303 GHSA-cp6g-7hqx-qxhp
  • GO-2026-5336 CVE-2026-45571 GHSA-crhj-59gh-8x96
  • GO-2026-5346 CVE-2026-52845 GHSA-f59h-q822-g45g
  • GO-2026-5408 GHSA-gx7w-56w6-g48x
  • GO-2026-5426 CVE-2026-39883 GHSA-hfvc-g4fc-pqhx
  • GO-2026-5435 CVE-2026-35206 GHSA-hr2v-4r36-88hr
  • GO-2026-5452 CVE-2026-34783 GHSA-j6v5-g24h-vg4j
  • GO-2026-5463 CVE-2026-8276 GHSA-jcqv-2g3v-gm88
  • GO-2026-5471 CVE-2026-6993 GHSA-jj45-xvq5-rhh9
  • GO-2026-5490 CVE-2026-44740 GHSA-m3xc-h892-ggx6
  • GO-2026-5492 CVE-2026-45135 GHSA-m675-2p33-xv9g
  • GO-2026-5506 CVE-2026-29181 GHSA-mh2q-q3fh-2475
  • GO-2026-5525 CVE-2026-42285 GHSA-p3w2-64xm-833j
  • GO-2026-5543 CVE-2026-32952 GHSA-pjcq-xvwq-hhpj
  • GO-2026-5548 CVE-2026-44166 GHSA-pq7p-mc74-g65w
  • GO-2026-5566 CVE-2026-35205 GHSA-q5jf-9vfq-h4h7
  • GO-2026-5569 GHSA-q76j-gcg9-vxc6
  • GO-2026-5585 CVE-2026-42554 GHSA-qjv7-627w-8qjv
  • GO-2026-5593 CVE-2026-40611 GHSA-qqx8-2xmm-jrv8
  • GO-2026-5595 CVE-2026-52844 GHSA-qrp7-cvwr-j2c6
  • GO-2026-5597 CVE-2026-44973 GHSA-qw64-3x98-g7q2
  • GO-2026-5606 GHSA-r46f-3rpw-hxrv
  • GO-2026-5617 CVE-2026-42306 GHSA-rg2x-37c3-w2rh
  • GO-2026-5660 CVE-2026-52846 GHSA-vcc4-2c75-vc9v
  • GO-2026-5666 CVE-2026-35204 GHSA-vmx8-mqv2-9gmg
  • GO-2026-5684 CVE-2026-42328 GHSA-w239-58x2-q8p5
  • GO-2026-5693 GHSA-w5pp-99ch-qj29
  • GO-2026-5730 GHSA-wwhq-w58m-w29c
  • GO-2026-5736 CVE-2026-44283 GHSA-x35m-3gp4-4fh5
  • GO-2026-5740 CVE-2026-44301 GHSA-x597-9fr4-5857
  • GO-2026-5748 CVE-2026-7482 GHSA-x8qc-fggm-mpqg
  • GO-2026-5750 CVE-2026-7020 GHSA-x99g-8v8j-25j2
  • GO-2026-5774 GHSA-3fxj-6jh8-hvhx
  • GO-2026-5775 GHSA-9g5q-2w5x-hmxf
  • GO-2026-5777 GHSA-rjr7-jggh-pgcp
  • GO-2026-5781
  • GO-2026-5841 GHSA-259r-337f-4rfw
  • GO-2026-5879 CVE-2026-50162 GHSA-8xwf-rjm4-xvhv
  • GO-2026-5880 CVE-2026-50163 GHSA-fxhp-mv3v-67qp
  • GO-2026-5882 CVE-2026-50151 GHSA-jxpm-75mh-9fp7
  • GO-2026-5884 GHSA-vh4v-2xq2-g5cg
  • GO-2026-5885 CVE-2026-48978 GHSA-xf85-363p-868w
  • GO-2026-5886 CVE-2026-44332 GHSA-g5vh-55hw-rxm8
  • GO-2026-5887 CVE-2026-45045 GHSA-gcfq-8gqf-4876
  • GO-2026-5912 CVE-2026-53624 GHSA-gv83-gqw6-9j2c
  • GO-2026-5954 CVE-2026-49838 GHSA-frrj-87jh-2772
  • GO-2026-5955 CVE-2026-49837 GHSA-gjrg-jjr3-56cm
  • GO-2026-5960 CVE-2026-54063 GHSA-h69g-9hx6-f3v4
  • GO-2026-5971 CVE-2026-37462 GHSA-pw7p-7fqv-hpj8
  • GO-2026-5983 CVE-2026-54448 GHSA-q3fv-x8vg-qqm4
  • GO-2026-6000 CVE-2026-50274 GHSA-74j5-xf3v-crq8
  • GO-2026-6058 CVE-2026-58442 GHSA-h2x6-g7q6-344v
  • GO-2026-6059 CVE-2026-58431 GHSA-h56g-4qw7-2mxg
  • GO-2026-6060 CVE-2026-58426 GHSA-hg5r-vq93-9fv6
  • GO-2026-6061 GHSA-hrxh-6v49-42gf
  • GO-2026-6062 CVE-2026-58434 GHSA-j2w3-9c3r-g83q
  • GO-2026-6063 CVE-2026-58417 GHSA-jr5x-6h83-wrxf
  • GO-2026-6064 CVE-2026-55984 GHSA-m932-crvm-gcp5
  • GO-2026-6065 CVE-2026-55982 GHSA-mg4f-x9v4-6h2p
  • GO-2026-6066 CVE-2026-58507 GHSA-p4mj-98mv-xq26
  • GO-2026-6067 CVE-2026-58445 GHSA-pgqf-926r-548m
  • GO-2026-6068 CVE-2026-58427 GHSA-prr9-9mp4-5gp2
  • GO-2026-6069 CVE-2026-58510 GHSA-q423-49rw-g9mh
  • GO-2026-6070 CVE-2026-58432 GHSA-q9pg-jj6x-j9p6
  • GO-2026-6071 CVE-2026-59766 GHSA-qf2f-qh6p-7v89
  • GO-2026-6072 CVE-2026-56750 GHSA-rgv6-xp99-6mgj
  • GO-2026-6073 CVE-2026-58435…
Record
openSUSE-SU-2026:21551-1
Updated
2026-11-02
OSVSUSE-SU-2026:23216-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260727T201416 2026-07-27T20:14:16Z (jsc#PED-11136):

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-5046 CVE-2026-46385 GHSA-w8j3-pq8g-8m7w
  • GO-2026-5047 CVE-2026-46384 GHSA-mc57-h6j3-3hmv
  • GO-2026-5048 GHSA-mx64-mj3q-7prj
  • GO-2026-5051
  • GO-2026-5069 CVE-2026-30246 GHSA-35hp-hqmv-8qg8
  • GO-2026-5074 CVE-2026-45022 GHSA-389r-gv7p-r3rp
  • GO-2026-5105 CVE-2026-41506 GHSA-3xc5-wrhm-f963
  • GO-2026-5116 CVE-2026-44517 GHSA-49p4-px3h-rq49
  • GO-2026-5158 CVE-2026-41178 GHSA-5wrp-cwcj-q835
  • GO-2026-5198 CVE-2026-41642 GHSA-7235-89m6-f4px
  • GO-2026-5208 CVE-2026-40890 GHSA-77fj-vx54-gvh7
  • GO-2026-5266 CVE-2026-41643 GHSA-8rxh-r2p6-7f2q
  • GO-2026-5309 GHSA-c3wq-j5vh-68rc
  • GO-2026-5327 CVE-2026-2303 GHSA-cp6g-7hqx-qxhp
  • GO-2026-5336 CVE-2026-45571 GHSA-crhj-59gh-8x96
  • GO-2026-5346 CVE-2026-52845 GHSA-f59h-q822-g45g
  • GO-2026-5408 GHSA-gx7w-56w6-g48x
  • GO-2026-5426 CVE-2026-39883 GHSA-hfvc-g4fc-pqhx
  • GO-2026-5435 CVE-2026-35206 GHSA-hr2v-4r36-88hr
  • GO-2026-5452 CVE-2026-34783 GHSA-j6v5-g24h-vg4j
  • GO-2026-5463 CVE-2026-8276 GHSA-jcqv-2g3v-gm88
  • GO-2026-5471 CVE-2026-6993 GHSA-jj45-xvq5-rhh9
  • GO-2026-5490 CVE-2026-44740 GHSA-m3xc-h892-ggx6
  • GO-2026-5492 CVE-2026-45135 GHSA-m675-2p33-xv9g
  • GO-2026-5506 CVE-2026-29181 GHSA-mh2q-q3fh-2475
  • GO-2026-5525 CVE-2026-42285 GHSA-p3w2-64xm-833j
  • GO-2026-5543 CVE-2026-32952 GHSA-pjcq-xvwq-hhpj
  • GO-2026-5548 CVE-2026-44166 GHSA-pq7p-mc74-g65w
  • GO-2026-5566 CVE-2026-35205 GHSA-q5jf-9vfq-h4h7
  • GO-2026-5569 GHSA-q76j-gcg9-vxc6
  • GO-2026-5585 CVE-2026-42554 GHSA-qjv7-627w-8qjv
  • GO-2026-5593 CVE-2026-40611 GHSA-qqx8-2xmm-jrv8
  • GO-2026-5595 CVE-2026-52844 GHSA-qrp7-cvwr-j2c6
  • GO-2026-5597 CVE-2026-44973 GHSA-qw64-3x98-g7q2
  • GO-2026-5606 GHSA-r46f-3rpw-hxrv
  • GO-2026-5617 CVE-2026-42306 GHSA-rg2x-37c3-w2rh
  • GO-2026-5660 CVE-2026-52846 GHSA-vcc4-2c75-vc9v
  • GO-2026-5666 CVE-2026-35204 GHSA-vmx8-mqv2-9gmg
  • GO-2026-5684 CVE-2026-42328 GHSA-w239-58x2-q8p5
  • GO-2026-5693 GHSA-w5pp-99ch-qj29
  • GO-2026-5730 GHSA-wwhq-w58m-w29c
  • GO-2026-5736 CVE-2026-44283 GHSA-x35m-3gp4-4fh5
  • GO-2026-5740 CVE-2026-44301 GHSA-x597-9fr4-5857
  • GO-2026-5748 CVE-2026-7482 GHSA-x8qc-fggm-mpqg
  • GO-2026-5750 CVE-2026-7020 GHSA-x99g-8v8j-25j2
  • GO-2026-5774 GHSA-3fxj-6jh8-hvhx
  • GO-2026-5775 GHSA-9g5q-2w5x-hmxf
  • GO-2026-5777 GHSA-rjr7-jggh-pgcp
  • GO-2026-5781
  • GO-2026-5841 GHSA-259r-337f-4rfw
  • GO-2026-5879 CVE-2026-50162 GHSA-8xwf-rjm4-xvhv
  • GO-2026-5880 CVE-2026-50163 GHSA-fxhp-mv3v-67qp
  • GO-2026-5882 CVE-2026-50151 GHSA-jxpm-75mh-9fp7
  • GO-2026-5884 GHSA-vh4v-2xq2-g5cg
  • GO-2026-5885 CVE-2026-48978 GHSA-xf85-363p-868w
  • GO-2026-5886 CVE-2026-44332 GHSA-g5vh-55hw-rxm8
  • GO-2026-5887 CVE-2026-45045 GHSA-gcfq-8gqf-4876
  • GO-2026-5912 CVE-2026-53624 GHSA-gv83-gqw6-9j2c
  • GO-2026-5954 CVE-2026-49838 GHSA-frrj-87jh-2772
  • GO-2026-5955 CVE-2026-49837 GHSA-gjrg-jjr3-56cm
  • GO-2026-5960 CVE-2026-54063 GHSA-h69g-9hx6-f3v4
  • GO-2026-5971 CVE-2026-37462 GHSA-pw7p-7fqv-hpj8
  • GO-2026-5983 CVE-2026-54448 GHSA-q3fv-x8vg-qqm4
  • GO-2026-6000 CVE-2026-50274 GHSA-74j5-xf3v-crq8
  • GO-2026-6058 CVE-2026-58442 GHSA-h2x6-g7q6-344v
  • GO-2026-6059 CVE-2026-58431 GHSA-h56g-4qw7-2mxg
  • GO-2026-6060 CVE-2026-58426 GHSA-hg5r-vq93-9fv6
  • GO-2026-6061 GHSA-hrxh-6v49-42gf
  • GO-2026-6062 CVE-2026-58434 GHSA-j2w3-9c3r-g83q
  • GO-2026-6063 CVE-2026-58417 GHSA-jr5x-6h83-wrxf
  • GO-2026-6064 CVE-2026-55984 GHSA-m932-crvm-gcp5
  • GO-2026-6065 CVE-2026-55982 GHSA-mg4f-x9v4-6h2p
  • GO-2026-6066 CVE-2026-58507 GHSA-p4mj-98mv-xq26
  • GO-2026-6067 CVE-2026-58445 GHSA-pgqf-926r-548m
  • GO-2026-6068 CVE-2026-58427 GHSA-prr9-9mp4-5gp2
  • GO-2026-6069 CVE-2026-58510 GHSA-q423-49rw-g9mh
  • GO-2026-6070 CVE-2026-58432 GHSA-q9pg-jj6x-j9p6
  • GO-2026-6071 CVE-2026-59766 GHSA-qf2f-qh6p-7v89
  • GO-2026-6072 CVE-2026-56750 GHSA-rgv6-xp99-6mgj
  • GO-2026-6073 CVE-2026-58435…
Record
SUSE-SU-2026:23216-1
Updated
2026-11-02
OSVSUSE-SU-2026:23227-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

  • Update to version 0.0.20260727T201416 2026-07-27T20:14:16Z (jsc#PED-11136):

Go CVE Numbering Authority IDs added or updated with aliases:

  • GO-2026-5046 CVE-2026-46385 GHSA-w8j3-pq8g-8m7w
  • GO-2026-5047 CVE-2026-46384 GHSA-mc57-h6j3-3hmv
  • GO-2026-5048 GHSA-mx64-mj3q-7prj
  • GO-2026-5051
  • GO-2026-5069 CVE-2026-30246 GHSA-35hp-hqmv-8qg8
  • GO-2026-5074 CVE-2026-45022 GHSA-389r-gv7p-r3rp
  • GO-2026-5105 CVE-2026-41506 GHSA-3xc5-wrhm-f963
  • GO-2026-5116 CVE-2026-44517 GHSA-49p4-px3h-rq49
  • GO-2026-5158 CVE-2026-41178 GHSA-5wrp-cwcj-q835
  • GO-2026-5198 CVE-2026-41642 GHSA-7235-89m6-f4px
  • GO-2026-5208 CVE-2026-40890 GHSA-77fj-vx54-gvh7
  • GO-2026-5266 CVE-2026-41643 GHSA-8rxh-r2p6-7f2q
  • GO-2026-5309 GHSA-c3wq-j5vh-68rc
  • GO-2026-5327 CVE-2026-2303 GHSA-cp6g-7hqx-qxhp
  • GO-2026-5336 CVE-2026-45571 GHSA-crhj-59gh-8x96
  • GO-2026-5346 CVE-2026-52845 GHSA-f59h-q822-g45g
  • GO-2026-5408 GHSA-gx7w-56w6-g48x
  • GO-2026-5426 CVE-2026-39883 GHSA-hfvc-g4fc-pqhx
  • GO-2026-5435 CVE-2026-35206 GHSA-hr2v-4r36-88hr
  • GO-2026-5452 CVE-2026-34783 GHSA-j6v5-g24h-vg4j
  • GO-2026-5463 CVE-2026-8276 GHSA-jcqv-2g3v-gm88
  • GO-2026-5471 CVE-2026-6993 GHSA-jj45-xvq5-rhh9
  • GO-2026-5490 CVE-2026-44740 GHSA-m3xc-h892-ggx6
  • GO-2026-5492 CVE-2026-45135 GHSA-m675-2p33-xv9g
  • GO-2026-5506 CVE-2026-29181 GHSA-mh2q-q3fh-2475
  • GO-2026-5525 CVE-2026-42285 GHSA-p3w2-64xm-833j
  • GO-2026-5543 CVE-2026-32952 GHSA-pjcq-xvwq-hhpj
  • GO-2026-5548 CVE-2026-44166 GHSA-pq7p-mc74-g65w
  • GO-2026-5566 CVE-2026-35205 GHSA-q5jf-9vfq-h4h7
  • GO-2026-5569 GHSA-q76j-gcg9-vxc6
  • GO-2026-5585 CVE-2026-42554 GHSA-qjv7-627w-8qjv
  • GO-2026-5593 CVE-2026-40611 GHSA-qqx8-2xmm-jrv8
  • GO-2026-5595 CVE-2026-52844 GHSA-qrp7-cvwr-j2c6
  • GO-2026-5597 CVE-2026-44973 GHSA-qw64-3x98-g7q2
  • GO-2026-5606 GHSA-r46f-3rpw-hxrv
  • GO-2026-5617 CVE-2026-42306 GHSA-rg2x-37c3-w2rh
  • GO-2026-5660 CVE-2026-52846 GHSA-vcc4-2c75-vc9v
  • GO-2026-5666 CVE-2026-35204 GHSA-vmx8-mqv2-9gmg
  • GO-2026-5684 CVE-2026-42328 GHSA-w239-58x2-q8p5
  • GO-2026-5693 GHSA-w5pp-99ch-qj29
  • GO-2026-5730 GHSA-wwhq-w58m-w29c
  • GO-2026-5736 CVE-2026-44283 GHSA-x35m-3gp4-4fh5
  • GO-2026-5740 CVE-2026-44301 GHSA-x597-9fr4-5857
  • GO-2026-5748 CVE-2026-7482 GHSA-x8qc-fggm-mpqg
  • GO-2026-5750 CVE-2026-7020 GHSA-x99g-8v8j-25j2
  • GO-2026-5774 GHSA-3fxj-6jh8-hvhx
  • GO-2026-5775 GHSA-9g5q-2w5x-hmxf
  • GO-2026-5777 GHSA-rjr7-jggh-pgcp
  • GO-2026-5781
  • GO-2026-5841 GHSA-259r-337f-4rfw
  • GO-2026-5879 CVE-2026-50162 GHSA-8xwf-rjm4-xvhv
  • GO-2026-5880 CVE-2026-50163 GHSA-fxhp-mv3v-67qp
  • GO-2026-5882 CVE-2026-50151 GHSA-jxpm-75mh-9fp7
  • GO-2026-5884 GHSA-vh4v-2xq2-g5cg
  • GO-2026-5885 CVE-2026-48978 GHSA-xf85-363p-868w
  • GO-2026-5886 CVE-2026-44332 GHSA-g5vh-55hw-rxm8
  • GO-2026-5887 CVE-2026-45045 GHSA-gcfq-8gqf-4876
  • GO-2026-5912 CVE-2026-53624 GHSA-gv83-gqw6-9j2c
  • GO-2026-5954 CVE-2026-49838 GHSA-frrj-87jh-2772
  • GO-2026-5955 CVE-2026-49837 GHSA-gjrg-jjr3-56cm
  • GO-2026-5960 CVE-2026-54063 GHSA-h69g-9hx6-f3v4
  • GO-2026-5971 CVE-2026-37462 GHSA-pw7p-7fqv-hpj8
  • GO-2026-5983 CVE-2026-54448 GHSA-q3fv-x8vg-qqm4
  • GO-2026-6000 CVE-2026-50274 GHSA-74j5-xf3v-crq8
  • GO-2026-6058 CVE-2026-58442 GHSA-h2x6-g7q6-344v
  • GO-2026-6059 CVE-2026-58431 GHSA-h56g-4qw7-2mxg
  • GO-2026-6060 CVE-2026-58426 GHSA-hg5r-vq93-9fv6
  • GO-2026-6061 GHSA-hrxh-6v49-42gf
  • GO-2026-6062 CVE-2026-58434 GHSA-j2w3-9c3r-g83q
  • GO-2026-6063 CVE-2026-58417 GHSA-jr5x-6h83-wrxf
  • GO-2026-6064 CVE-2026-55984 GHSA-m932-crvm-gcp5
  • GO-2026-6065 CVE-2026-55982 GHSA-mg4f-x9v4-6h2p
  • GO-2026-6066 CVE-2026-58507 GHSA-p4mj-98mv-xq26
  • GO-2026-6067 CVE-2026-58445 GHSA-pgqf-926r-548m
  • GO-2026-6068 CVE-2026-58427 GHSA-prr9-9mp4-5gp2
  • GO-2026-6069 CVE-2026-58510 GHSA-q423-49rw-g9mh
  • GO-2026-6070 CVE-2026-58432 GHSA-q9pg-jj6x-j9p6
  • GO-2026-6071 CVE-2026-59766 GHSA-qf2f-qh6p-7v89
  • GO-2026-6072 CVE-2026-56750 GHSA-rgv6-xp99-6mgj
  • GO-2026-6073 CVE-2026-58435…
Record
SUSE-SU-2026:23227-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
github.com/gomarkdown/markdown
Go
 before 0.0.0-20260411013819-759bbc3e3207
0.0.0-20260411013819-759bbc3e3207
golang-github-gomarkdown-markdown
Debian:12
 All versions, plus listed versions
0.0~git20220731.dcdaee8-20.0~git20231115.a660076-10.0~git20260725.8435af3-1
 None known
golang-github-gomarkdown-markdown
Debian:13
 All versions, plus listed versions
0.0~git20231115.a660076-10.0~git20260725.8435af3-1
 None known
golang-github-gomarkdown-markdown
Debian:14
 before 0.0~git20260725.8435af3-1, plus listed versions
0.0~git20231115.a660076-1
0.0~git20260725.8435af3-1
govulncheck-vulndb
SUSE:Linux Enterprise Server 16.0
From an advisory covering 77 CVEs
 before 0.0.20260727T201416-160000.1.1
0.0.20260727T201416-160000.1.1
govulncheck-vulndb
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 77 CVEs
 before 0.0.20260727T201416-160000.1.1
0.0.20260727T201416-160000.1.1
golang-github-gomarkdown-markdown
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.0~git20220731.dcdaee8-20.0~git20231115.a660076-1
 None known
golang-github-gomarkdown-markdown
Ubuntu:25.10
 All versions, plus listed versions
0.0~git20231115.a660076-1
 None known
golang-github-gomarkdown-markdown
Ubuntu:26.10
 All versions, plus listed versions
0.0~git20231115.a660076-10.0~git20260725.8435af3-1
 None known
golang-github-gomarkdown-markdown
Ubuntu:26.04:LTS
 All versions, plus listed versions
0.0~git20231115.a660076-1
 None known
govulncheck-vulndb
openSUSE:Leap 16.0
From an advisory covering 77 CVEs
 before 0.0.20260727T201416-160000.1.1
0.0.20260727T201416-160000.1.1

History

History
RecordedChangedSources
affected, factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-40890 is a high vulnerability (CVSS 7.5) in Gomarkdown Markdown, published April 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.35%, the 28th percentile. Fixed in github.com/gomarkdown/markdown 0.0.0-20260411013819-759bbc3e3207.

References

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Left out here: the rest of 3 source descriptions. The JSON record has them.

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