jxrlib: heap buffer overflow

jxrlib

jxrlib has memory bugs, including a heap buffer overflow, triggered by damaged JPEG XR files, fixed in mircomir/jxrlib 1.4.4

Do this now

Upgrade jxrlib to mircomir/jxrlib 1.4.4 and avoid opening untrusted JPEG XR files until then.

Fix it

Upgrade to mircomir/jxrlib 1.4.4

First seen: 24 Oct 2026
Last update: 24 Oct 2026, 09:22 UTC
Fixed in: mircomir/jxrlib 1.4.4
Source: news
On the menu as: Linux server software

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## jxrlib: heap buffer overflow
Severity: unknown. Patch status: partial fix.
Affected: jxrlib
Fixed in: mircomir/jxrlib 1.4.4

jxrlib has memory bugs, including a heap buffer overflow, triggered by damaged JPEG XR files, fixed in mircomir/jxrlib 1.4.4

## Steps
1. Search every lockfile and manifest (package-lock.json, yarn.lock, pnpm-lock.yaml, requirements*.txt, poetry.lock, uv.lock, composer.lock, go.sum, Cargo.lock, Gemfile.lock) for `mircomir/jxrlib`. For each hit, compare the installed version with the fix on the same major line: mircomir/jxrlib 1.4.4. If it's lower, give the exact upgrade command for the package manager this repo uses.
2. There is only a partial fix. Until one ships: jxrlib has memory bugs, including a heap buffer overflow, triggered by damaged JPEG XR files, fixed in mircomir/jxrlib 1.4.4

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://seclists.org/oss-sec/2026/q4/368
https://pwned.coffee/i/jxrlib-heap-buffer-overflow

Receipt

Exploitation: No known exploitation
Fix by release line: Product Affected Fixed in Source
mircomir/jxrlib before 1.4.4 1.4.4 Reported
Score: No CVSS published yet: severity unknown.
Last checked: 24 Oct 2026, 11:17 UTC

Product	Affected	Fixed in	Source
mircomir/jxrlib	before 1.4.4	1.4.4	Reported

Sources: KEV – CVE record – Vendor –

Sources

seclists.org: jxrlib: memory bugs on damaged JPEG XR files, fixed in mircomir/jxrlib 1.4.4, still in most distributions

Totalone coffee