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CVE-2021-27804JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
- 9.8CriticalCVSS base score
- 4.0%Exploitation in 30 daysEPSS · top 9.3% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
Timeline
ID reserved
By mitre
- 4 days later
· 4 days later
Published
- 3 years later
· 3 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.0% · top 9.3% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
n/a
- affected n/a
References
References4
- https://gitlab.com/wg1/jpeg-xl/-/tags (opens in a new tab)x_refsource_MISCx_transferred
- http://www.openwall.com/lists/oss-security/2021/03/01/3 (opens in a new tab)x_refsource_MISCx_transferred
- 20210302 Multiple Vulnerabilities in jpeg-xl (CVE-2021-27804) (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
- http://packetstormsecurity.com/files/161623/jpeg-xl-0.3.1-Memory-Corruption.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2021-14545 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2021-27804)Record last updated .