High severity · published Dec 27, 2024
CVE-2024-56522
An issue was discovered in TCPDF before 6.8.0
7.5
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TC
tcpdf · tecnick
before 6.8.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-56522
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-56522
Patch
https://github.com/tecnickcom/TCPDF/commit/d54b97cec33f4f1a5ad81119a82085cad93cec89
Issue Tracking
https://github.com/tecnickcom/TCPDF/compare/6.7.8...6.8.0
Product
https://tcpdf.org
Not Applicable
https://www.php.net/manual/en/types.comparisons.php
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/06/msg00004.html
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