CVE-2026-57161

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.5% (37th percentile of EPSS-scored CVEs). 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
8.2EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.2Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

PJSIP is a free and open source multimedia communication library written in C. Prior to commit acc03b5, a stack buffer overflow exists in PJSUA when processing Service-Route headers in a registration response (update_service_route() in pjsua_acc.c). This affects applications that register using the PJSUA/PJSUA2 account API (the default registration path). The Service-Route URIs from a 2xx response to REGISTER are stored into a fixed-size array without bounding the number of headers; a registrar that returns an excessive number of Service-Route headers can write past the end of the array on the stack. The values written are internal pointers rather than arbitrary data, so the most likely impact is unexpected application termination (denial of service), though memory corruption cannot be excluded. The malicious response may come from a compromised or malicious registrar, or — over unprotected transports — a spoofed response. This issue has been patched via commit acc03b5.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
52
EG Risk 52/100CISA SSVC

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
Severity82% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.5%
EPSS %ILE
37th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines at low or medium mission impact and sooner than that at high; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 4, 2026

Last Modified

September 11, 2026

Advisory Details (2)

Auto-updated Sep 4, 2026
Fix referenced — no release confirmed yet. Sources: github, github_commit.
github_commit

commit acc03b57cef7 (pjsip/pjproject)

Fix landed in pjsip/pjproject commit acc03b57cef7 — awaiting tagged release

https://github.com/pjsip/pjproject/commit/acc03b57cef7a7d31b8e1f5b9117437d7e87c591
githubMentions a patch (unverified)

Stack overflow handling Service-Route headers in a registration response · Advisory · pjsip/pjproject · GitHub

https://github.com/pjsip/pjproject/security/advisories/GHSA-xc62-j9h2-mp84

Affected Packages

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
asterisk0.1.11-3 ... 1:22.9.0+dfsg+~cs6.16.60671434-1 (296 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 53× 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. 2026-10-09 23:05 UTCEG score recompute
  2. 2026-10-09 20:07 UTCEPSS rescore
  3. 2026-10-09 01:09 UTCEG score recompute
  4. 2026-10-08 17:13 UTCEPSS rescore
  5. 2026-10-07 23:48 UTCEPSS rescore
  6. 2026-10-07 01:03 UTCEG score recompute
  7. 2026-10-06 15:18 UTCEPSS rescore
  8. 2026-10-06 01:37 UTCEG score recompute
  9. 2026-10-05 17:43 UTCEPSS rescore
  10. 2026-10-05 02:18 UTCEG score recompute
  11. 2026-10-04 23:22 UTCEPSS rescore
  12. 2026-10-03 14:54 UTCEG score recompute
  13. 2026-10-03 14:26 UTCEPSS rescore
  14. 2026-10-03 03:07 UTCEG score recompute
  15. 2026-10-02 17:56 UTCEPSS rescore
  16. 2026-10-02 03:37 UTCEG score recompute
  17. 2026-10-01 19:50 UTCEPSS rescore
  18. 2026-09-30 15:26 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescore
  20. 2026-09-30 02:40 UTCEG score recompute
  21. 2026-09-29 15:22 UTCEPSS rescore
  22. 2026-09-29 01:22 UTCEG score recompute
  23. 2026-09-28 13:51 UTCEPSS rescore
  24. 2026-09-27 14:33 UTCEG score recompute
  25. 2026-09-27 13:48 UTCEPSS rescore
Show 42 more
  1. 2026-09-27 02:57 UTCEG score recompute
  2. 2026-09-26 15:59 UTCEPSS rescore
  3. 2026-09-26 02:09 UTCEG score recompute
  4. 2026-09-24 18:59 UTCEG score recompute
  5. 2026-09-24 14:04 UTCEPSS rescore
  6. 2026-09-23 19:45 UTCEG score recompute
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-22 20:08 UTCEG score recompute
  9. 2026-09-22 08:32 UTCEG score recompute
  10. 2026-09-20 21:41 UTCEG score recompute
  11. 2026-09-20 20:16 UTCEPSS rescore
  12. 2026-09-19 22:29 UTCEG score recompute
  13. 2026-09-18 23:14 UTCEG score recompute
  14. 2026-09-18 19:28 UTCEPSS rescore
  15. 2026-09-17 23:56 UTCEG score recompute
  16. 2026-09-17 19:31 UTCEPSS rescore
  17. 2026-09-16 23:30 UTCEG score recompute
  18. 2026-09-16 14:08 UTCEPSS rescore
  19. 2026-09-16 11:53 UTCEG score recompute
  20. 2026-09-16 05:15 UTCEPSS rescore
  21. 2026-09-15 12:40 UTCEG score recompute
  22. 2026-09-15 03:11 UTCEPSS rescore
  23. 2026-09-14 01:48 UTCEG score recompute
  24. 2026-09-13 16:47 UTCEPSS rescore
  25. 2026-09-13 02:36 UTCEG score recompute
  26. 2026-09-11 15:48 UTCEG score recompute▼ 0.60
  27. 2026-09-11 15:48 UTCNVD updateCVSS v3 → 8.2
  28. 2026-09-11 14:53 UTCEPSS rescore
  29. 2026-09-10 17:42 UTCEG score recompute
  30. 2026-09-10 09:35 UTCEPSS rescore
  31. 2026-09-09 18:29 UTCEG score recompute
  32. 2026-09-09 17:55 UTCEG score recompute
  33. 2026-09-09 09:30 UTCEG score recompute
  34. 2026-09-08 22:01 UTCEPSS rescore
  35. 2026-09-07 16:13 UTCEG score recompute
  36. 2026-09-07 16:01 UTCEPSS rescore
  37. 2026-09-06 17:01 UTCEG score recompute
  38. 2026-09-06 13:47 UTCEPSS rescore
  39. 2026-09-05 17:48 UTCEG score recompute
  40. 2026-09-04 18:35 UTCEG score recompute
  41. 2026-09-04 17:20 UTCEG score recompute
  42. 2026-09-04 17:19 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-57161?
CVE-2026-57161 is a high vulnerability published on September 4, 2026. PJSIP is a free and open source multimedia communication library written in C. Prior to commit acc03b5, a stack buffer overflow exists in PJSUA when processing Service-Route headers in a registration response (updateserviceroute() in pjsua_acc.c). This affects applications that register using the…
When was CVE-2026-57161 disclosed?
CVE-2026-57161 was first published on September 4, 2026, with the most recent update on September 11, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57161 actively exploited?
CVE-2026-57161 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57161?
CVE-2026-57161 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-57161?
A fix for CVE-2026-57161 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

Dependency Blast Radius

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