CVE-2026-15713

MEDIUMPre-NVD 5.95.9
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
5.9EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated attacker acting as a malicious network peer can trick the connection engine into allocating stream states that are subsequently leaked during cleanup. Over a sustained period, this flaw allows the remote attacker to consume the system's heap allocations incrementally, triggering a denial of service (DoS) through an ultimate Out-of-Memory (OOM) application crash.

CVSS v3
5.9
EG Score
5.9MEDIUMmedium confidence
EG Risk
27
EG Risk 27/100

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 (value × EchelonGraph’s weight)
Severity59% × 45%
The EG Score, 5.9 of 10.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
26th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 14, 2026

Last Modified

July 15, 2026

Advisory Details (3)

Auto-updated Jul 15, 2026
Patch available. Sources: redhat.
Web page

(#YWH-PGM9867-209) Information Disclosure and Cross-User Credential Leak in SoupSession through SoupCache:get_cacheability() in libsoup/cache/soup-cache.c via Header "`Authorization`and `Cache-Control: max-age=600`" with SOUP_CACHE_SHARED mode (#541) · Issues · GNOME / libsoup · GitLab

https://gitlab.gnome.org/GNOME/libsoup/-/work_items/541
Red Hat

2499941 – (CVE-2026-15713) CVE-2026-15713 libsoup: SoupCache: libsoup: HTTP/2 frame window exhaustion remote denial of service via memory leak

https://bugzilla.redhat.com/show_bug.cgi?id=2499941
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-15713

Vendor Advisories for CVE-2026-15713(2)

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

Affected Packages

(6 across 4 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.74.3-1 ... 2.74.3-9 (16 versions)
  • every version on: no fix on record
—
libsoup33.2.2-2 ... 3.6.6-1 (35 versions)
  • every version on: no fix on record
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.74.3-10.1, 2.74.3-11
  • every version on: no fix on record
—
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)
  • every version on: no fix on record
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libsoup2.42.72.0-2 ... 2.74.3-9 (28 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libsoup33.6.5-3 ... 3.6.6-1 (8 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 / 39× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 181 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 81 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  3. 2026-10-12 16:31 UTCEG score recompute
  4. 2026-10-11 20:09 UTCEG score recompute
  5. 2026-10-11 17:22 UTCEG score recompute
  6. 2026-10-11 14:55 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  8. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  9. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  10. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  11. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  17. 2026-10-01 12:52 UTCEG score recompute
  18. 2026-10-01 12:52 UTCVendor advisory
  19. 2026-10-01 12:52 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  23. 2026-09-28 08:53 UTCEG score recompute
  24. 2026-09-28 08:53 UTCVendor advisory
  25. 2026-09-28 08:53 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
Show 75 more
  1. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  2. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  3. 2026-09-24 09:00 UTCEG score recompute
  4. 2026-09-24 09:00 UTCVendor advisory
  5. 2026-09-24 09:00 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  6. 2026-09-23 03:28 UTCEG score recompute
  7. 2026-09-23 03:28 UTCVendor advisory
  8. 2026-09-23 03:28 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  9. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  10. 2026-09-18 04:51 UTCEG score recompute
  11. 2026-09-18 04:51 UTCVendor advisory
  12. 2026-09-18 04:51 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  13. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  14. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  15. 2026-09-14 08:36 UTCEG score recompute
  16. 2026-09-14 08:36 UTCVendor advisory
  17. 2026-09-14 08:36 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  18. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  19. 2026-09-13 07:39 UTCEG score recompute
  20. 2026-09-13 07:39 UTCVendor advisory
  21. 2026-09-13 07:39 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  22. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  23. 2026-09-11 21:54 UTCEG score recompute
  24. 2026-09-11 21:54 UTCVendor advisory
  25. 2026-09-11 21:54 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  26. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  27. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  28. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  29. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  30. 2026-09-08 01:09 UTCEG score recompute
  31. 2026-09-08 01:09 UTCVendor advisory
  32. 2026-09-08 01:09 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  33. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  34. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  35. 2026-09-05 20:58 UTCEG score recompute
  36. 2026-09-05 20:58 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  37. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  38. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  39. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  40. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  41. 2026-08-31 05:16 UTCEG score recompute
  42. 2026-08-31 05:16 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  43. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  44. 2026-08-30 04:12 UTCEG score recompute
  45. 2026-08-30 04:12 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  46. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  47. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  48. 2026-08-28 01:53 UTCEG score recompute
  49. 2026-08-28 01:53 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  50. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  51. 2026-08-26 23:19 UTCEG score recompute
  52. 2026-08-26 23:19 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  53. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  54. 2026-08-25 21:10 UTCEG score recompute
  55. 2026-08-25 21:10 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  56. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  57. 2026-08-24 19:38 UTCEG score recompute
  58. 2026-08-24 19:38 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  59. 2026-08-23 15:58 UTCEG score recompute
  60. 2026-08-23 15:58 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  61. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  62. 2026-08-22 15:01 UTCEG score recompute
  63. 2026-08-22 15:01 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  64. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  65. 2026-08-21 14:03 UTCEG score recompute
  66. 2026-08-21 14:03 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  67. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  68. 2026-08-20 12:20 UTCEG score recompute
  69. 2026-08-20 12:20 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  70. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  71. 2026-08-19 11:23 UTCEG score recompute
  72. 2026-08-19 11:23 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9
  73. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  74. 2026-08-18 10:18 UTCEG score recompute
  75. 2026-08-18 10:18 UTCGHSA enrichmentGHSA-wr2r-8grw-r4x2 · GitHub CVSS 5.9

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Frequently asked(5)

What is CVE-2026-15713?
CVE-2026-15713 is a medium-severity vulnerability; its CVE record was published on July 14, 2026. A vulnerability was found in libsoup's HTTP/2 protocol implementation. The library fails to correctly release memory context blocks under specific stream termination conditions, such as when an HTTP/2 connection encounters window exhaustion or explicit stream resets. A remote, unauthenticated…
When was CVE-2026-15713 made public?
CVE-2026-15713 was made public on July 14, 2026: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on July 14, 2026. EchelonGraph's copy of the record carries a last-modified date of July 15, 2026; the record at its source may have been updated since.
Is CVE-2026-15713 actively exploited?
CVE-2026-15713 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (26th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15713?
CVE-2026-15713 has a CVSS base score of 5.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15713?
A fix for CVE-2026-15713 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-15713 are linked in the Vendor Advisories panel on this page.

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