01 Record
CVE-2026-112921
Robots::Validate versions from 0.4.3 before 0.4.10 for Perl report clients as imposter robots when User-Agent matcher state carries over from a previous request
UnratedPUBLISHEDCNA: CPANSec
CNA base scoreUnratedNo CNA CVSS vector
02 Description
Robots::Validate versions from 0.4.3 before 0.4.10 for Perl report clients as imposter robots when User-Agent matcher state carries over from a previous request
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.22% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 13.6% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-22.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-10-21 21:37Z7 DAYS AGO
- Last updated
- 2026-10-22 00:16Z7 DAYS AGO
- Reserved
- 2026-10-19
- Assigning CNA
- CPANSec
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-488Exposure of Data Element to Wrong SessionBase
- Data version
- 5.2
- Document digest
- 40d4ec5a6ac8d0282d5b513948c40ec01dd46344d99be849f37623c4a7084f0a
05 Affected products
No products listed
06 References
- github.comhttps://github.com/robrwo/Robots-Validate/commit/776a1456e6605492b7582ed25d3d5006ef384402.patch
- metacpan.orghttps://metacpan.org/release/RRWO/Robots-Validate-v0.4.10/changes
- metacpan.orghttps://metacpan.org/release/RRWO/Robots-Validate-v0.4.11/changes
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/10/21/30
07 Remediation
Upgrade to Robots-Validate v0.4.10 or later. Deployments with Algorithm::AhoCorasick::XS should upgrade to v0.4.11, which fixed a bug with using that version.