CVE-2026-5435

HIGHPre-NVD 7.37.3—
EchelonGraph scoreMEDIUM confidence

Score 7.3 from GitHub Security Advisory (severity: HIGH) published 2026-04-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.3Exploit: None knownExposed: 0

A fix is available — apply it.

The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.

CVSS v3
7.3
EG Score
7.3(medium)
EG Risk
48(Track)
EG Risk 48/100SSVC: 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
Severity73% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

April 28, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated May 6, 2026
No patch confirmed yet.
generic

34033 – (CVE-2026-5435) resolv/ns_print.c: ns_sprintrrf TSIG path bypasses buflen and can overflow caller buffer

https://sourceware.org/bugzilla/show_bug.cgi?id=34033
generic

The GNU C Library security advisories update for 2026-04-28

https://inbox.sourceware.org/libc-announce/[email protected]/T/#u

Vendor Advisories for CVE-2026-5435(12)

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

Patch Availability(9)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatinsights-proxy/insights-proxy-container-rhel9:17864336562026-08-11redhat
redhatrhosdt/opentelemetry-rhel9-operator:17857045472026-08-04redhat
redhatdiscovery/discovery-ui-rhel9:17848217502026-07-27redhat
redhatrhui5/rhua-rhel9:17847950762026-07-23redhat
redhatrhosdt/tempo-rhel9-operator:17847757822026-07-23redhat
redhatglibc-0:2.34-274.el9_82026-07-22redhat
redhatglibc-0:2.28-251.el8_10.402026-07-21redhat
redhatglibc-0:2.39-128.el10_22026-07-21redhat
redhatglibc-main-2.42-12.hum12026-05-01redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
glibc2.31-13 ... 2.43-2 (208 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
glibc2.36-10~0 ... 2.43-2 (125 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
glibc2.41-12 ... 2.43-2 (31 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
glibc2.41-12 ... 2.43-2 (27 versions)——

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 62× 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 232 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-5435?
CVE-2026-5435 is a high vulnerability published on April 28, 2026. The deprecated functions nsprintrrf, nsprintrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.
When was CVE-2026-5435 disclosed?
CVE-2026-5435 was first published in the National Vulnerability Database on April 28, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5435 actively exploited?
CVE-2026-5435 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 85.4% of all scored CVEs.
What is the CVSS score of CVE-2026-5435?
CVE-2026-5435 has a CVSS v3.1 base score of 7.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-5435?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5435, 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.

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