libwebp: OOB write in BuildHuffmanTable
CISA confirms exploitation of this vulnerability in real attacks. Prioritise checking whether your application is affected. CISA KEV · CC0 1.0
Heap buffer overflow in libwebp allow a remote attacker to perform an out of bounds memory write via a crafted HTML page.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | electron | >= 22.0.0, < 22.3.24, >= 24.0.0, < 24.8.3, >= 25.0.0, < 25.8.1, >= 26.0.0, < 26.2.1, >= 27.0.0-beta.1, < 27.0.0-beta.2 | 22.3.24, 24.8.3, 25.8.1, 26.2.1, 27.0.0-beta.2 |
| .NET (NuGet) | magick.net-q16-anycpu | < 13.3.0 | 13.3.0 |
| .NET (NuGet) | magick.net-q16-hdri-anycpu | < 13.3.0 | 13.3.0 |
| .NET (NuGet) | magick.net-q16-x64 | < 13.3.0 | 13.3.0 |
| .NET (NuGet) | magick.net-q8-anycpu | < 13.3.0 | 13.3.0 |
| .NET (NuGet) | magick.net-q8-openmp-x64 | < 13.3.0 | 13.3.0 |
| .NET (NuGet) | magick.net-q8-x64 | < 13.3.0 | 13.3.0 |
| .NET (NuGet) | SkiaSharp | >= 2.0.0, < 2.88.6 | 2.88.6 |
| Python (PyPI) | pillow | < 10.0.1 | 10.0.1 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-4863
- https://github.com/qnighy/libwebp-sys2-rs/pull/21
- https://github.com/python-pillow/Pillow/pull/7395
- https://github.com/jaredforth/webp/pull/30
- https://github.com/electron/electron/pull/39823
- https://github.com/electron/electron/pull/39825
- https://github.com/electron/electron/pull/39826
- https://github.com/electron/electron/pull/39827
- https://github.com/electron/electron/pull/39828
- https://github.com/webmproject/libwebp/commit/902bc9190331343b2017211debcec8d2ab87e17a
- https://github.com/qnighy/libwebp-sys2-rs/commit/4560c473a76ec8bd8c650f19ddf9d7a44f719f8b
- https://github.com/jaredforth/webp/commit/9d4c56e63abecc777df71c702503c3eaabd7dcbc
- https://security.gentoo.org/glsa/202401-10
- https://security.gentoo.org/glsa/202309-05
- https://security-tracker.debian.org/tracker/CVE-2023-4863
- https://rustsec.org/advisories/RUSTSEC-2023-0061.html
- https://rustsec.org/advisories/RUSTSEC-2023-0060.html
- https://pillow.readthedocs.io/en/stable/releasenotes/10.0.1.html#security
- https://news.ycombinator.com/item?id=37478403
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-4863
- https://adamcaudill.com/2023/09/14/whose-cve-is-it-anyway
- https://security.netapp.com/advisory/ntap-20230929-0011
- https://sethmlarson.dev/security-developer-in-residence-weekly-report-16
- https://stackdiary.com/critical-vulnerability-in-webp-codec-cve-2023-4863
- https://www.bentley.com/advisories/be-2023-0001
- https://www.bleepingcomputer.com/news/google/google-fixes-another-chrome-zero-day-bug-exploited-in-attacks
- https://www.debian.org/security/2023/dsa-5496
- https://www.debian.org/security/2023/dsa-5497
- https://www.debian.org/security/2023/dsa-5498
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-40
- https://www.vicarius.io/vsociety/posts/zero-day-webp-vulnerability-cve-2023-4863
- https://blog.isosceles.com/the-webp-0day
- https://bugzilla.suse.com/show_bug.cgi?id=1215231
- https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html
- https://crbug.com/1479274
- https://en.bandisoft.com/honeyview/history
- https://github.com/ImageMagick/ImageMagick/discussions/6664
- https://github.com/dlemstra/Magick.NET/releases/tag/13.3.0
- https://github.com/webmproject/libwebp
- https://github.com/webmproject/libwebp/releases/tag/v1.3.2
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
CWE-787- Platform
- npm, .NET (NuGet), Python (PyPI)
- Package
electron, magick.net-q16-anycpu, magick.net-q16-hdri-anycpu- Disclosed
- 12.09.2023
- Updated
- 11.10.2026 13:18
Sources and licenses
OSV / GitHub Advisory Database - GHSA-j7hp-h8jx-5ppr - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-1794 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: magick.net-q8-openmp-x64
All published vulnerabilities of this package (.NET (NuGet)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 157
- First → latest
- 09.2023 09.2026
- Without a fix
- 1
- Exploited in attacks
- 1
Severity breakdown
- High 24
- Medium 93
- Low 40
Disclosures per year
- 2023: 1
- 2024: 0
- 2025: 14
- 2026: 142
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libwebp: OOB write in BuildHuffmanTable this entry
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