CVE-2026-90558

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-12. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

sngrep through 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines when header values exceed the 255-byte buffer limit. Attackers can craft malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields to overflow stack buffers and cause crashes or execute arbitrary code during packet parsing and rendering.

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

September 12, 2026

Last Modified

September 23, 2026

Advisory Details (5)

Auto-updated Sep 23, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

sngrep through 1.8.4 Stack Buffer Overflow via SIP Headers | Advisories | VulnCheck

https://www.vulncheck.com/advisories/sngrep-through-1.8.4-stack-buffer-overflow-via-sip-headers
github_commit

commit 1ff74ee3ab5f (irontec/sngrep)

Fix landed in irontec/sngrep commit 1ff74ee3ab5f — awaiting tagged release

https://github.com/irontec/sngrep/commit/1ff74ee3ab5ff280e8ba976aa8c744dca57eb35b
generic

sngrep/src/sip_msg.c at v1.8.4 · irontec/sngrep · GitHub

https://github.com/irontec/sngrep/blob/v1.8.4/src/sip_msg.c#L150
generic

sngrep/src/sip_call.c at v1.8.4 · irontec/sngrep · GitHub

https://github.com/irontec/sngrep/blob/v1.8.4/src/sip_call.c#L260
generic

GitHub - irontec/sngrep: Ncurses SIP Messages flow viewer · GitHub

https://github.com/irontec/sngrep

Vendor Advisories for CVE-2026-90558(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 60× in last 7d / 112× 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.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-09-25 12:53 UTCGHSA enrichment
  2. 2026-09-25 09:16 UTCGHSA enrichment
  3. 2026-09-25 05:39 UTCGHSA enrichment
  4. 2026-09-25 02:03 UTCGHSA enrichment
  5. 2026-09-24 22:26 UTCGHSA enrichment
  6. 2026-09-24 18:49 UTCGHSA enrichment
  7. 2026-09-24 15:12 UTCEG score recompute
  8. 2026-09-24 15:12 UTCGHSA enrichment
  9. 2026-09-24 14:04 UTCEPSS rescore
  10. 2026-09-24 11:26 UTCGHSA enrichment
  11. 2026-09-24 07:49 UTCGHSA enrichment
  12. 2026-09-24 04:13 UTCGHSA enrichment
  13. 2026-09-24 00:35 UTCGHSA enrichment
  14. 2026-09-23 20:59 UTCEG score recompute
  15. 2026-09-23 20:59 UTCGHSA enrichment
  16. 2026-09-23 17:54 UTCEPSS rescore
  17. 2026-09-23 17:22 UTCGHSA enrichment
  18. 2026-09-23 14:11 UTCGHSA enrichment
  19. 2026-09-23 10:35 UTCGHSA enrichment
  20. 2026-09-23 06:56 UTCGHSA enrichment
  21. 2026-09-23 03:19 UTCGHSA enrichment
  22. 2026-09-22 23:42 UTCGHSA enrichment
  23. 2026-09-22 20:06 UTCGHSA enrichment
  24. 2026-09-22 16:29 UTCEG score recompute
  25. 2026-09-22 16:29 UTCGHSA enrichment
Show 75 more
  1. 2026-09-22 16:01 UTCEPSS rescore
  2. 2026-09-22 12:46 UTCGHSA enrichment
  3. 2026-09-22 09:10 UTCGHSA enrichment
  4. 2026-09-22 05:30 UTCGHSA enrichment
  5. 2026-09-22 01:53 UTCGHSA enrichment
  6. 2026-09-21 22:17 UTCEG score recompute
  7. 2026-09-21 22:17 UTCGHSA enrichment
  8. 2026-09-21 21:09 UTCEPSS rescore
  9. 2026-09-21 18:40 UTCGHSA enrichment
  10. 2026-09-21 15:02 UTCGHSA enrichment
  11. 2026-09-21 11:25 UTCGHSA enrichment
  12. 2026-09-21 07:48 UTCGHSA enrichment
  13. 2026-09-21 04:11 UTCGHSA enrichment
  14. 2026-09-21 00:34 UTCGHSA enrichment
  15. 2026-09-20 20:57 UTCEG score recompute
  16. 2026-09-20 20:57 UTCGHSA enrichment
  17. 2026-09-20 20:16 UTCEPSS rescore
  18. 2026-09-20 17:20 UTCGHSA enrichment
  19. 2026-09-20 13:44 UTCGHSA enrichment
  20. 2026-09-20 10:05 UTCGHSA enrichment
  21. 2026-09-20 06:27 UTCGHSA enrichment
  22. 2026-09-20 02:48 UTCGHSA enrichment
  23. 2026-09-19 23:12 UTCGHSA enrichment
  24. 2026-09-19 19:35 UTCGHSA enrichment
  25. 2026-09-19 15:58 UTCEG score recompute
  26. 2026-09-19 15:58 UTCGHSA enrichment
  27. 2026-09-19 12:04 UTCGHSA enrichment
  28. 2026-09-19 08:27 UTCGHSA enrichment
  29. 2026-09-19 04:50 UTCGHSA enrichment
  30. 2026-09-19 01:12 UTCGHSA enrichment
  31. 2026-09-18 21:36 UTCEG score recompute
  32. 2026-09-18 21:36 UTCGHSA enrichment
  33. 2026-09-18 19:28 UTCEPSS rescore
  34. 2026-09-18 17:59 UTCGHSA enrichment
  35. 2026-09-18 14:22 UTCGHSA enrichment
  36. 2026-09-18 10:43 UTCGHSA enrichment
  37. 2026-09-18 07:06 UTCGHSA enrichment
  38. 2026-09-18 03:29 UTCGHSA enrichment
  39. 2026-09-17 23:52 UTCGHSA enrichment
  40. 2026-09-17 19:35 UTCEG score recompute
  41. 2026-09-17 19:35 UTCGHSA enrichment
  42. 2026-09-17 19:32 UTCEPSS rescore
  43. 2026-09-17 13:57 UTCGHSA enrichment
  44. 2026-09-17 10:20 UTCGHSA enrichment
  45. 2026-09-17 06:42 UTCGHSA enrichment
  46. 2026-09-17 02:54 UTCGHSA enrichment
  47. 2026-09-16 23:17 UTCGHSA enrichment
  48. 2026-09-16 19:40 UTCGHSA enrichment
  49. 2026-09-16 16:03 UTCEG score recompute
  50. 2026-09-16 16:03 UTCGHSA enrichment
  51. 2026-09-16 14:09 UTCEPSS rescore
  52. 2026-09-16 12:26 UTCGHSA enrichment
  53. 2026-09-16 08:49 UTCEG score recompute
  54. 2026-09-16 08:49 UTCGHSA enrichment
  55. 2026-09-16 05:15 UTCEPSS rescore
  56. 2026-09-16 04:27 UTCGHSA enrichment
  57. 2026-09-16 00:48 UTCGHSA enrichment
  58. 2026-09-15 21:11 UTCGHSA enrichment
  59. 2026-09-15 17:34 UTCGHSA enrichment
  60. 2026-09-15 13:56 UTCGHSA enrichment
  61. 2026-09-15 10:19 UTCGHSA enrichment
  62. 2026-09-15 06:41 UTCEG score recompute
  63. 2026-09-15 06:41 UTCGHSA enrichment
  64. 2026-09-15 03:12 UTCEPSS rescore
  65. 2026-09-15 03:04 UTCGHSA enrichment
  66. 2026-09-14 23:27 UTCGHSA enrichment
  67. 2026-09-14 19:21 UTCEG score recompute
  68. 2026-09-14 19:21 UTCGHSA enrichment
  69. 2026-09-14 18:40 UTCEG score recompute
  70. 2026-09-14 18:40 UTCGHSA enrichment
  71. 2026-09-14 18:09 UTCGHSA enrichment
  72. 2026-09-14 13:50 UTCGHSA enrichment
  73. 2026-09-14 10:13 UTCGHSA enrichment
  74. 2026-09-14 06:36 UTCGHSA enrichment
  75. 2026-09-14 03:00 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-90558?
CVE-2026-90558 is a critical vulnerability published on September 12, 2026. sngrep through 1.8.4 contains stack buffer overflow vulnerabilities in SIP attribute formatting routines when header values exceed the 255-byte buffer limit. Attackers can craft malicious SIP packets with oversized Call-ID, X-Call-ID, or other header fields to overflow stack buffers and cause…
When was CVE-2026-90558 disclosed?
CVE-2026-90558 was first published in the National Vulnerability Database on September 12, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90558 actively exploited?
CVE-2026-90558 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 42.7% of all scored CVEs.
What is the CVSS score of CVE-2026-90558?
CVE-2026-90558 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-90558?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90558, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-90558

Explore →

Is Your Infrastructure Affected by CVE-2026-90558?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs