CVE-2026-15712

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-07-14. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.9Exploit: None knownExposed: 0

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

A heap buffer over-read vulnerability was discovered in libsoup's (versions: libsoup 3.0 to 3.7.0) HTTP/2 connection tracking framework. When the library processes an HTTP/2 GOAWAY frame, it improperly handles the "Additional Debug Data" payload by assuming the data stream is a safely NUL-terminated C-string. Because the parser lacks strict length-boundary verification before reading this data, a remote, unauthenticated attacker can intentionally send a malformed GOAWAY frame missing the appropriate null delimiter. This causes the library to read past the end of the allocated buffer, triggering an application crash that results in a denial of service (DoS), or potentially exposing fragments of memory contents.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: redhat.
generic🟡 PoC Available

(#YWH-PGM9867-228) libsoup HTTP/2 GOAWAY Heap Buffer Over-Read via NUL-Terminated String Assumption (#540) · Issues · GNOME / libsoup · GitLab

https://gitlab.gnome.org/GNOME/libsoup/-/work_items/540
redhat

2499939 – (CVE-2026-15712) CVE-2026-15712 SoupClientMessageIOHTTP2: libsoup3: libsoup: HTTP/2 GOAWAY frame parsing heap buffer over-read via invalid NUL-termination assumption

https://bugzilla.redhat.com/show_bug.cgi?id=2499939
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-15712

Vendor Advisories for CVE-2026-15712(2)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libsoup33.2.2-2 ... 3.6.6-1 (35 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 79× 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 110 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15712?
CVE-2026-15712 is a medium vulnerability published on July 14, 2026. A heap buffer over-read vulnerability was discovered in libsoup's (versions: libsoup 3.0 to 3.7.0) HTTP/2 connection tracking framework. When the library processes an HTTP/2 GOAWAY frame, it improperly handles the "Additional Debug Data" payload by assuming the data stream is a safely…
When was CVE-2026-15712 disclosed?
CVE-2026-15712 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15712 actively exploited?
CVE-2026-15712 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 51.2% of all scored CVEs.
What is the CVSS score of CVE-2026-15712?
CVE-2026-15712 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-15712?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15712, 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

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