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CVE-2026-82481

The cohttp package before 6.3.0 for OCaml allows directory traversal.

8.7 High

The cohttp package before 6.3.0 for OCaml allows directory traversal.

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
None
Availability
None

Exploit likelihood

0.70%Up 0.2 points since Aug 30, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.7

The cohttp package before 6.3.0 for OCaml allows directory traversal.

Record
CVE-2026-82481
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/AU:Y/R:A/V:D/RE:M
Weakness
CWE-180
Updated
2026-11-02
EUVDEUVD-2026-68116 8.7

The cohttp package before 6.3.0 for OCaml allows directory traversal.

Record
EUVD-2026-68116
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/AU:Y/R:A/V:D/RE:M
Updated
2026-11-02
GitHub AdvisoriesGHSA-qcjm-vmrx-v935 8.7

The cohttp package before 6.3.0 for OCaml allows directory traversal.

The cohttp package before 6.3.0 for OCaml allows directory traversal.

Record
GHSA-qcjm-vmrx-v935
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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:Y/R:A/V:D/RE:M/U:X
Weakness
CWE-180
Updated
2026-11-02
NVD 8.7

The cohttp package before 6.3.0 for OCaml allows directory traversal.

Record
CVE-2026-82481
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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:Y/R:A/V:D/RE:M/U:X
Weakness
CWE-180
Updated
2026-11-02
OSV 8.7

The cohttp package before 6.3.0 for OCaml allows directory traversal.

Record
CVE-2026-82481
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/AU:Y/R:A/V:D/RE:M
Weakness
CWE-180
Updated
2026-11-02
OSVDEBIAN-CVE-2026-82481 8.7

The cohttp package before 6.3.0 for OCaml allows directory traversal.

Record
DEBIAN-CVE-2026-82481
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/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:Y/R:A/V:D/RE:M/U:X
Updated
2026-11-02
OSVUBUNTU-CVE-2026-82481 8.7

The cohttp package before 6.3.0 for OCaml allows directory traversal.

Record
UBUNTU-CVE-2026-82481
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/AU:Y/R:A/V:D/RE:M
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ocaml-cohttp
Debian:12
 All versions, plus listed versions
4.0.0-35.1.0-15.1.0-25.3.0-15.3.0-2
Show 7 moreShow less
6.2.1-16.2.1-26.2.1-36.2.1-46.2.2-16.3.0-16.3.0-2
 None known
ocaml-cohttp
Debian:13
 All versions, plus listed versions
5.3.0-15.3.0-26.2.1-16.2.1-26.2.1-3
Show 4 moreShow less
6.2.1-46.2.2-16.3.0-16.3.0-2
 None known
ocaml-cohttp
Debian:14
 All versions, plus listed versions
5.3.0-15.3.0-26.2.1-16.2.1-26.2.1-3
Show 4 moreShow less
6.2.1-46.2.2-16.3.0-16.3.0-2
 None known
ocaml-cohttp
Ubuntu:22.04:LTS
 All versions, plus listed versions
4.0.0-1build2
 None known
ocaml-cohttp
Ubuntu:24.04:LTS
 All versions, plus listed versions
5.1.0-2build35.3.0-15.3.0-1build15.3.0-1build45.3.0-1build55.3.0-1build6
 None known
ocaml-cohttp
Ubuntu:26.10
 All versions, plus listed versions
5.3.0-2build86.2.2-1
 None known
ocaml-cohttp
Ubuntu:26.04:LTS
 All versions, plus listed versions
5.3.0-1build295.3.0-25.3.0-2build25.3.0-2build35.3.0-2build55.3.0-2build8
 None known

History

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

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

In short

CVE-2026-82481 is a high vulnerability (CVSS 8.7) in Mirage Cohttp, published August 29, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.70%, the 53rd percentile. No source names a fixed version.

References

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