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Critical 9.8Published Apr 17, 2026

CVE-2026-40494SAIL has heap buffer overflow in TGA RLE decoder — raw packet path missing bounds check

Updated under an hour ago ()

Does this affect you?

It affects HappySeaFox sail. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. Prior to commit 45d48d1f2e8e0d73e80bc1fd5310cb57f4547302, the TGA codec's RLE decoder in `tga.c` has an asymmetric bounds check vulnerability. The run-packet path (line 297) correctly clamps the repeat count to the remaining buffer space, but the raw-packet path (line 305-311) has no equivalent bounds check. This allows writing up to 496 bytes of attacker-controlled data past the end of a heap buffer. Commit 45d48d1f2e8e0d73e80bc1fd5310cb57f4547302 patches the issue.

CVSS
9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE)
CWE-787
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
GitHub_M
NVD analysis
Deferred
Record last updated
Apr 20, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
HappySeaFox sail
happyseafox:sail (from the name)
before 45d48d1f2e8e0d73e80bc1fd5310cb57f4547302
CNA record

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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