CVE-2026-12547

LOWPre-NVD 3.43.4—
EchelonGraph scoreMEDIUM confidence

Score 3.4 from GitHub Security Advisory (severity: LOW) published 2026-07-21. a secondary CVSS source baseline 3.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
3.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.4Exploit: None knownExposed: 0

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

SoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.

CVSS v3
3.4
EG Score
3.4(medium)
EG Risk
20(Track)
EG Risk 20/100SSVC: 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
Severity34% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
13%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 21, 2026

References (3)

Vendor Advisories for CVE-2026-12547(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 rangeFixed inDependents
libsoup2.42.74.3-1 ... 2.74.3-9 (16 versions)——
libsoup33.2.2-2 ... 3.6.6-1 (35 versions)——
Debian:13(2)
PackageVulnerable rangeFixed inDependents
libsoup2.42.74.3-10.1, 2.74.3-11——
libsoup33.6.5-3 ... 3.6.6-1 (8 versions)——
Debian:11(1)
PackageVulnerable rangeFixed inDependents
libsoup2.42.72.0-2 ... 2.74.3-9 (28 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 10× in last 7d / 38× 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. 2026-09-11 14:52 UTCEPSS rescore
  2. 2026-09-11 09:36 UTCEPSS rescore
  3. 2026-09-10 09:34 UTCEPSS rescore
  4. 2026-09-09 11:28 UTCEG score recompute
  5. 2026-09-09 11:28 UTCGHSA enrichment
  6. 2026-09-08 22:00 UTCEPSS rescore
  7. 2026-09-07 16:01 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-05 08:47 UTCEG score recompute
  10. 2026-09-05 08:47 UTCGHSA enrichment
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:11 UTCEPSS rescore
  13. 2026-09-01 13:53 UTCEPSS rescore
  14. 2026-09-01 04:39 UTCEPSS rescore
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 02:14 UTCEG score recompute
  17. 2026-08-30 02:14 UTCGHSA enrichment
  18. 2026-08-28 21:40 UTCEPSS rescore
  19. 2026-08-27 14:24 UTCEPSS rescore
  20. 2026-08-26 02:10 UTCEG score recompute
  21. 2026-08-26 02:10 UTCGHSA enrichment
  22. 2026-08-25 13:48 UTCEPSS rescore
  23. 2026-08-23 00:34 UTCEG score recompute
  24. 2026-08-23 00:34 UTCGHSA enrichment
  25. 2026-08-21 23:48 UTCEPSS rescore
Show 53 more
  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-19 23:01 UTCEG score recompute
  3. 2026-08-19 23:01 UTCGHSA enrichment
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-16 21:27 UTCEG score recompute
  7. 2026-08-16 21:27 UTCGHSA enrichment
  8. 2026-08-16 14:56 UTCEPSS rescore
  9. 2026-08-16 02:14 UTCEPSS rescore
  10. 2026-08-15 01:30 UTCEPSS rescore
  11. 2026-08-13 22:00 UTCEPSS rescore
  12. 2026-08-13 19:53 UTCEG score recompute
  13. 2026-08-13 19:53 UTCGHSA enrichment
  14. 2026-08-12 13:50 UTCEPSS rescore
  15. 2026-08-11 13:42 UTCEPSS rescore
  16. 2026-08-10 23:59 UTCEPSS rescore
  17. 2026-08-10 18:20 UTCEG score recompute
  18. 2026-08-10 18:20 UTCGHSA enrichment
  19. 2026-08-09 13:46 UTCEPSS rescore
  20. 2026-08-08 16:37 UTCEPSS rescore
  21. 2026-08-07 16:43 UTCEG score recompute
  22. 2026-08-07 16:43 UTCGHSA enrichment
  23. 2026-08-06 13:46 UTCEPSS rescore
  24. 2026-08-05 19:17 UTCEPSS rescore
  25. 2026-08-04 15:09 UTCEG score recompute
  26. 2026-08-04 15:09 UTCGHSA enrichment
  27. 2026-08-04 15:09 UTCEPSS rescore
  28. 2026-08-04 10:38 UTCEPSS rescore
  29. 2026-08-03 10:35 UTCEPSS rescore
  30. 2026-08-02 02:26 UTCEPSS rescore
  31. 2026-08-01 13:36 UTCEG score recompute
  32. 2026-08-01 13:36 UTCGHSA enrichment
  33. 2026-08-01 04:15 UTCEPSS rescore
  34. 2026-07-30 16:27 UTCEPSS rescore
  35. 2026-07-30 01:30 UTCEPSS rescore
  36. 2026-07-29 12:03 UTCEG score recompute
  37. 2026-07-29 12:03 UTCGHSA enrichment
  38. 2026-07-28 15:36 UTCEPSS rescore
  39. 2026-07-27 14:13 UTCEPSS rescore
  40. 2026-07-26 14:54 UTCEPSS rescore
  41. 2026-07-26 14:54 UTCEPSS rescore
  42. 2026-07-26 10:29 UTCEG score recompute
  43. 2026-07-26 10:29 UTCGHSA enrichment
  44. 2026-07-25 14:17 UTCEPSS rescore
  45. 2026-07-24 14:17 UTCEPSS rescore
  46. 2026-07-23 14:18 UTCEPSS rescore
  47. 2026-07-23 03:05 UTCEG score recompute
  48. 2026-07-22 23:03 UTCEG score recompute
  49. 2026-07-22 23:03 UTCGHSA enrichment
  50. 2026-07-22 14:08 UTCEPSS rescore
  51. 2026-07-21 19:31 UTCEG score recompute
  52. 2026-07-21 18:45 UTCEG score recompute
  53. 2026-07-21 18:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-12547?
CVE-2026-12547 is a low vulnerability published on July 21, 2026. SoupAuthManager caches proxy authentication credentials without scoping them to the proxy authority (host:port). When the proxy configuration changes (e.g., via system settings or WPAD), cached Proxy-Authorization headers from the previous proxy are sent to the new proxy, leaking credentials.
When was CVE-2026-12547 disclosed?
CVE-2026-12547 was first published in the National Vulnerability Database on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12547 actively exploited?
CVE-2026-12547 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 86.5% of all scored CVEs.
What is the CVSS score of CVE-2026-12547?
CVE-2026-12547 has a CVSS v3 base score of 3.4 (NVD).
How do I remediate CVE-2026-12547?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12547, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-12547

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