CVE-2021-27804
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
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
What each source reports
NVD Score used
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
- Record
CVE-2021-27804- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-787
- Updated
- 2026-11-02
CVE List No score
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
- Record
CVE-2021-27804- Updated
- 2026-11-02
EUVDEUVD-2021-14545 No score
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
- Record
EUVD-2021-14545- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-6qm8-hwqx-wv6m No score
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
- Record
GHSA-6qm8-hwqx-wv6m- Weakness
- CWE-787
- Updated
- 2026-11-02
OSV
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
- Record
CVE-2021-27804- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-27804 is a critical vulnerability (CVSS 9.8) in Libjxl Project Libjxl, published March 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.99%, the 90th percentile. No source names a fixed version.