CVE-2020-36846 json
IO::Compress::Brotli versions prior to 0.007 for Perl have an integer overflow in the bundled Brotli C library
published last yr. modified 4mo ago also EUVD-2025-16444
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 51%
- public exploits
- 0
- none known
Summary
A buffer overflow, as described in CVE-2020-8927, exists in the embedded Brotli library. Versions of IO::Compress::Brotli prior to 0.007 included a version of the brotli library prior to version 1.0.8, where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. It is recommended to update your IO::Compress::Brotli module to 0.007 or later. If one cannot update, we recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.
Patch / fix
- TIMLEGGE IO::Compress::Brotli 0.007
- govulncheck-vulndb openSUSE Tumbleweed 0.0.20250612T141001-1.1
opensuse advisories openSUSE-SU-2025:15225-1
- github.com/google/brotli@223d80c commit
- github.com/google/brotli#826 pull request
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Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- last yr.
Exploit prediction
0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- TIMLEGGE IO::Compress::Brotli
Classification
- Weakness
-
- CWE-1395 Dependency on Vulnerable Third-Party Component
References
-
github.com
/google/brotli/pull/826
issue-tracking
-
github.com
/google/brotli/commit/223d80cfbec8fd346e32906c732c8ede21f0cea6
patch
-
github.com
/advisories/GHSA-5v8v-66v8-mwm7
third-party-advisory
-
github.com
/timlegge/perl-IO-Compress-Brotli/blob/8b44c83b23bb4658179e1494af4b725a1bc476bc/Changes#L52
mitigation
-
nvd.nist.gov
/vuln/detail/CVE-2020-8927
vdb-entry
Sources
- CVE List CVE-2020-36846
- NVD CVE-2020-36846
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.