CVE-2026-42225

MEDIUMNVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.9 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 94% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, on GnuTLS builds, the SIP TLS transport (sip_transport_tls) can accept connections with invalid or untrusted certificates even when the application explicitly enables certificate verification via verify_server = PJ_TRUE or verify_client = PJ_TRUE. This issue has been patched in version 2.17.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity59% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

May 7, 2026

Last Modified

May 12, 2026

Advisory Details (3)

Auto-updated May 7, 2026
Patch available. Sources: github.
github Patch Available

GnuTLS backend silently skips certificate chain verification when verify_peer is false · Advisory · pjsip/pjproject · GitHub

https://github.com/pjsip/pjproject/security/advisories/GHSA-x2fv-6j6c-pxmx
generic

Release PJSIP version 2.17 · pjsip/pjproject · GitHub

https://github.com/pjsip/pjproject/releases/tag/2.17
generic

Merge commit from fork · pjsip/pjproject@ef68425 · GitHub

https://github.com/pjsip/pjproject/commit/ef684252bb62b0716675b6e99ad7fe4c90e28920

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 34× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-26 14:54 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-25 14:18 UTCEPSS rescore
  4. 2026-07-23 14:18 UTCEPSS rescore
  5. 2026-07-23 03:11 UTCEG score recompute
  6. 2026-07-22 14:08 UTCEPSS rescore
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  12. 2026-07-16 17:03 UTCEPSS rescore
  13. 2026-07-16 09:53 UTCOSV refresh
  14. 2026-07-15 16:57 UTCEPSS rescore
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  1. 2026-07-06 02:23 UTCEPSS rescore
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  10. 2026-06-25 13:49 UTCEPSS rescore
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  19. 2026-06-19 19:25 UTCEPSS rescore
  20. 2026-06-18 17:52 UTCEPSS rescore
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  22. 2026-06-15 17:49 UTCEPSS rescore
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  26. 2026-06-11 14:00 UTCEPSS rescore
  27. 2026-06-10 22:18 UTCEPSS rescore
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  30. 2026-06-08 14:17 UTCEPSS rescore
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  44. 2026-05-31 22:30 UTCEPSS rescore
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  48. 2026-05-29 13:44 UTCEPSS rescore
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  50. 2026-05-28 13:44 UTCEPSS rescore
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  53. 2026-05-27 13:40 UTCEPSS rescore
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  56. 2026-05-26 13:44 UTCEPSS rescore
  57. 2026-05-26 07:18 UTCEPSS rescore
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  59. 2026-05-20 22:38 UTCEPSS rescore
  60. 2026-05-20 22:38 UTCEPSS rescore
  61. 2026-05-20 13:52 UTCEG score recompute
  62. 2026-05-20 11:22 UTCEPSS rescore
  63. 2026-05-20 11:22 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42225?
CVE-2026-42225 is a medium vulnerability published on May 7, 2026. PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, on GnuTLS builds, the SIP TLS transport (siptransporttls) can accept connections with invalid or untrusted certificates even when the application explicitly enables certificate verification via…
When was CVE-2026-42225 disclosed?
CVE-2026-42225 was first published in the National Vulnerability Database on May 7, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42225 actively exploited?
CVE-2026-42225 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 94.3% of all scored CVEs.
What is the CVSS score of CVE-2026-42225?
CVE-2026-42225 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-42225?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42225, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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