CVE-2024-56522
unknown
CVSS v3
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CVSS v4 NEW
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VIR risk
—
Description
An issue was discovered in TCPDF before 6.8.0. unserializeTCPDFtag uses != (aka loose comparison) and does not use a constant-time function to compare TCPDF tag hashes.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.8.0+dfsg-1 |
| sid | Fixed | 6.8.0+dfsg-1 |
| forky | Fixed | 6.8.0+dfsg-1 |
| bullseye | Fixed | 6.3.5+dfsg1-1+deb11u1 |
| bookworm | Fixed | 6.6.2+dfsg1-1+deb12u1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | tecnickcom/tcpdf | <6.8.0 | 6.8.0 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2024-56522
- https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89
- https://github.com/tecnickcom/TCPDF
- https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
- https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html
- https://tcpdf.org
- https://www.php.net/manual/en/types.comparisons.php
- https://security-tracker.debian.org/tracker/CVE-2024-56522
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.